{"title":"Mercury 30 (2 CYL.)(2-STROKE)(International) (0N055505 \u0026 Up) Parts \u0026 Diagrams","description":"\u003cp\u003eOEM and aftermarket replacement parts for Mercury 30 (2 CYL.)(2-STROKE)(International). Scroll down for exploded parts diagrams (30), specifications, and maintenance reference.\u003c\/p\u003e","products":[{"product_id":"ignition-key-switch-for-mercury-mariner-dfi-efi-mpi-outboard-motors-87-17009a5","title":"87-17009A5 Ignition Key Switch for Mercury | JLM Marine","description":"\u003ch2\u003eIgnition Key Switch for Mercury Outboard – 87-17009A5\u003c\/h2\u003e\n\n\u003cp\u003eThis ignition key switch is engineered for Mercury outboard remote control systems, providing reliable 3-position operation (Off-Run-Start) with push-to-choke functionality in the start position. Designed for Commander 2000 and 4000 series side-mount remote controls, it fits a wide range of 2-cylinder Mercury and Mariner outboards from 9.9HP to 30HP across model years 1986 through 2010.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDirect Replacement:\u003c\/strong\u003e OEM part number \u003cstrong\u003e87-17009A5\u003c\/strong\u003e (Mercury 17009A5 SWITCH ASSY). Compatible with Commander 2000 (16900 Series) and Remote Control-4000 Side Mount systems without power trim.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagneto-style ignition switch\u003c\/strong\u003e with heavy-duty potted construction for marine durability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePush-to-choke function\u003c\/strong\u003e in start position for easier cold starts\u003c\/li\u003e\n\u003cli\u003eCompact dimensions: 58.18 × 37.62 × 17.54 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e87-17009A5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e17009A5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\n\u003cp\u003eConfirm your engine model\/year in the table below. For Mercury owners, here's a guide to help you identify your engine's serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/mercury-outboard-serial-number-guide\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Serial Number Guide\u003c\/a\u003e. You can also review exploded diagrams to verify part numbers: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/diagrams\/mercury-parts-catalog\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Parts Diagrams \u0026amp; Catalog\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eHP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Outboard\u003c\/td\u003e\n\u003ctd\u003e18HP\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003e2 CYL\u003c\/td\u003e\n\u003ctd\u003eSerial 0N001590 - 0N055284\u003c\/td\u003e\n\u003ctd\u003eRemote Control (Cat.# 90-803827)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Outboard\u003c\/td\u003e\n\u003ctd\u003e15HP\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e2 CYL\u003c\/td\u003e\n\u003ctd\u003eSerial 0N001590 - 0N055284\u003c\/td\u003e\n\u003ctd\u003eRemote Control (Cat.# 90-803827)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Outboard\u003c\/td\u003e\n\u003ctd\u003e25HP\u003c\/td\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003ctd\u003e2 CYL\u003c\/td\u003e\n\u003ctd\u003eSerial 0N018456 - 0N055504 (Belgium)\u003c\/td\u003e\n\u003ctd\u003eRemote Control with Quicksilver Logo (Cat.# 90-803821)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Outboard\u003c\/td\u003e\n\u003ctd\u003e30HP\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e2 CYL\u003c\/td\u003e\n\u003ctd\u003eSerial 0N001875 - 0N055504 (Belgium)\u003c\/td\u003e\n\u003ctd\u003eRemote Control with Quicksilver Logo (Cat.# 90-803821)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Outboard\u003c\/td\u003e\n\u003ctd\u003e9.9HP\u003c\/td\u003e\n\u003ctd\u003e9.9\u003c\/td\u003e\n\u003ctd\u003e2 CYL\u003c\/td\u003e\n\u003ctd\u003eSerial 0N059858 \u0026amp; Up\u003c\/td\u003e\n\u003ctd\u003eRemote Control-4000 Side Mount (Non Power Trim, Cat.# 90-803827006)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Outboard\u003c\/td\u003e\n\u003ctd\u003eCommander 2000 Remote Control\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003ctd\u003e1986 - 1993\u003c\/td\u003e\n\u003ctd\u003eRigging Parts Remote Controls and Components\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Outboard\u003c\/td\u003e\n\u003ctd\u003eCommander 2000 Remote Control (16900 Series)\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003ctd\u003e1994 \u0026amp; Up\u003c\/td\u003e\n\u003ctd\u003eRigging Parts Remote Controls and Components\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Boats (Quicksilver Inflatable)\u003c\/td\u003e\n\u003ctd\u003eAA380DH4A\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003ctd\u003e2004\u003c\/td\u003e\n\u003ctd\u003eRemote Control Components\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Boats (Quicksilver Inflatable)\u003c\/td\u003e\n\u003ctd\u003eAA320DH4M\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003ctd\u003e2004\u003c\/td\u003e\n\u003ctd\u003eRemote Control Components\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Boats (Quicksilver Inflatable)\u003c\/td\u003e\n\u003ctd\u003eAA320005M\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003ctd\u003e2006\u003c\/td\u003e\n\u003ctd\u003eRemote Control Components\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Accessories\u003c\/td\u003e\n\u003ctd\u003eRemote Control-4000 Side Mount (Non Power Trim)\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003ctd\u003e1994 \u0026amp; Up\u003c\/td\u003e\n\u003ctd\u003eCat.# 90-8M0125572\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Outboard\u003c\/td\u003e\n\u003ctd\u003e1025312FL\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003ctd\u003e2010\u003c\/td\u003e\n\u003ctd\u003eRemote Control-4000 Side Mount (Non Power Trim)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMariner Outboard\u003c\/td\u003e\n\u003ctd\u003e15HP (7015213RL)\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003ctd\u003e2004\u003c\/td\u003e\n\u003ctd\u003eRemote Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMariner Outboard\u003c\/td\u003e\n\u003ctd\u003e15HP (7015213KL)\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003ctd\u003e2001\u003c\/td\u003e\n\u003ctd\u003eRemote Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOEM Part Number\u003c\/td\u003e\n\u003ctd\u003e87-17009A5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSwitch Type\u003c\/td\u003e\n\u003ctd\u003eMagneto-style ignition switch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePosition\u003c\/td\u003e\n\u003ctd\u003e3-Position (Off-Run-Start)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChoke Function\u003c\/td\u003e\n\u003ctd\u003ePush to choke in start position\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eHeavy-duty potted construction, minimal bleed per circuit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003ePlastic + Metal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e58.18 × 37.62 × 17.54 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e1 × Ignition Key Switch\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisconnect the battery\u003c\/strong\u003e before beginning any electrical work to prevent accidental shorts or sparks.\u003c\/li\u003e\n\u003cli\u003eAccess the back of your remote control box by removing the cover or housing screws. Locate the existing ignition switch.\u003c\/li\u003e\n\u003cli\u003eDisconnect the wiring harness from the old switch, noting the wire positions or taking a photo for reference.\u003c\/li\u003e\n\u003cli\u003eRemove the retaining nut or mounting hardware securing the old switch to the control panel.\u003c\/li\u003e\n\u003cli\u003ePull the old switch out from the front of the control panel.\u003c\/li\u003e\n\u003cli\u003eInsert the new ignition switch into the panel opening from the front. Ensure proper orientation (Off-Run-Start positions match your control layout).\u003c\/li\u003e\n\u003cli\u003eSecure the switch from behind with the retaining nut or mounting hardware. Tighten until snug but do not over-torque plastic threads.\u003c\/li\u003e\n\u003cli\u003eReconnect the wiring harness to the terminals on the new switch, matching your reference notes or photo.\u003c\/li\u003e\n\u003cli\u003eVerify all connections are firm and properly seated. Check that no wires are pinched or exposed.\u003c\/li\u003e\n\u003cli\u003eReinstall the remote control cover or housing and secure all screws.\u003c\/li\u003e\n\u003cli\u003eReconnect the battery and test the switch in all three positions: Off, Run, and Start with choke function.\u003c\/li\u003e\n\u003cli\u003eConfirm the engine starts normally and that the key can be removed only in the Off position.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow do I confirm this ignition switch fits my Mercury remote control?\u003c\/strong\u003e\u003cbr\u003e\nCheck the compatible engine models table above for your HP rating, serial number range, and remote control series (Commander 2000 or 4000 Side Mount). You can also cross-reference your existing switch with OEM part number 87-17009A5 or verify fitment using the Mercury parts diagrams linked in the compatibility section.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat should I do if the engine won't start after installing the new switch?\u003c\/strong\u003e\u003cbr\u003e\nFirst, verify all wiring connections match your original configuration and are fully seated. Check that the battery is reconnected and charged, and confirm the switch clicks firmly into each position (Off-Run-Start). If the issue persists, test for continuity across switch terminals in the Run and Start positions using a multimeter.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I use this switch on a remote control with power trim?\u003c\/strong\u003e\u003cbr\u003e\nThis switch is designed for non-power-trim Commander 2000 and 4000 side-mount remote controls. If your system includes power trim functionality, verify your control box wiring and switch terminal configuration match before installation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow does the push-to-choke feature work in the start position?\u003c\/strong\u003e\u003cbr\u003e\nWhen you turn the key to Start, you can push the key inward to engage the choke circuit, enriching the fuel mixture for easier cold starts. Release the push after the engine fires and return the key to the Run position.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat are signs that my ignition switch needs replacement?\u003c\/strong\u003e\u003cbr\u003e\nCommon symptoms include intermittent starting, the engine cutting out in the Run position, difficulty turning the key, inability to remove the key in Off position, or visible corrosion and damage to the switch housing or terminals.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eOEM vs. Aftermarket—what's the difference?\u003c\/strong\u003e\u003cbr\u003e\nThis listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow fast do you ship and how much does it cost?\u003c\/strong\u003e\u003cbr\u003e\nWe offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat is your warranty and return policy?\u003c\/strong\u003e\u003cbr\u003e\nThis product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused \u0026amp; in original condition); please see our policy page or reach out for instructions.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eVerify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.\u003c\/li\u003e\n\u003cli\u003eThis product is an aftermarket replacement part and is not an OEM component.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended to ensure safety and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality Assured:\u003c\/strong\u003e As a trusted manufacturer for over 20 years, we supply top marine brands globally.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Global Shipping:\u003c\/strong\u003e Free delivery worldwide in 5–15 days.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect from Manufacturer:\u003c\/strong\u003e Competitive pricing without compromising quality.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":49560696160569,"sku":"23KS476","price":21.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/Ignition_Key_Switch_for_Mercury_Mariner_DFI_EFI_MPI_Outboard_Motors_____87-17009A5_-_JLM_MARINE-8287244.png?v=1755252892"},{"product_id":"thermostat-for-tohatsu-mercury-2-6-hp-4-st-3h6-01030-0-804540-345-01030-0-3h6-01030-0","title":"18-3638 Outboard Thermostat for Mercury Mariner | JLM Marine","description":"\u003ch2\u003eThermostat for Mercury Mariner Outboard – Fits 2.5-6 HP Models\u003c\/h2\u003e\n\n\u003cp\u003eThis high-quality aftermarket thermostat is engineered to fit Mercury Mariner 2-stroke outboard engines ranging from 2.5 HP to 6 HP. Designed as a direct replacement for OEM part numbers 804540 and 853704, it ensures reliable temperature regulation for your outboard motor.\u003c\/p\u003e\n\n\u003cp\u003eThe kit includes both the thermostat and a rubber seal ring, providing everything needed for a complete installation. Compatible with Mercury Mariner 2.5-3.5 HP models (serial 0R131842 \u0026amp; Up) and 4-6 HP models (serial 0R411838 \u0026amp; Up).\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eComplete kit includes thermostat and rubber seal ring\u003c\/li\u003e\n\u003cli\u003eDirect replacement for OEM 804540 and 853704\u003c\/li\u003e\n\u003cli\u003eEnsures proper engine temperature control\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Mariner\u003c\/td\u003e\n\u003ctd\u003e804540\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Mariner\u003c\/td\u003e\n\u003ctd\u003e853704\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJLM Marine\u003c\/td\u003e\n\u003ctd\u003e18-3638\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\n\u003cp\u003eConfirm your engine model\/year in the table below. For Mercury owners, here's a guide to help you identify your engine's serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/mercury-outboard-serial-number-guide\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Serial Number Guide\u003c\/a\u003e. You can also review exploded diagrams to verify part numbers: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/diagrams\/mercury-parts-catalog\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Parts Diagrams \u0026amp; Catalog\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Mariner\u003c\/td\u003e\n\u003ctd\u003eSerial 0R131842 \u0026amp; Up\u003c\/td\u003e\n\u003ctd\u003e2.5-3.5 HP\u003c\/td\u003e\n\u003ctd\u003e2-Stroke Outboards\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Mariner\u003c\/td\u003e\n\u003ctd\u003eSerial 0R411838 \u0026amp; Up\u003c\/td\u003e\n\u003ctd\u003e4-6 HP\u003c\/td\u003e\n\u003ctd\u003e2-Stroke Outboards\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOEM Number\u003c\/td\u003e\n\u003ctd\u003e18-3638\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReplaces OEM Part Numbers\u003c\/td\u003e\n\u003ctd\u003e804540, 853704\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eMercury Mariner 2.5-6 HP Outboards\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngine Type\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e1 × Thermostat\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e1 × Ring Rubber Seal\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n\u003cli\u003eAllow the engine to cool completely before beginning work. Ensure the ignition is off and disconnect the battery if applicable.\u003c\/li\u003e\n\u003cli\u003eLocate the thermostat housing on your Mercury Mariner outboard engine. It is typically found near the cylinder head or water jacket outlet.\u003c\/li\u003e\n\u003cli\u003eRemove the mounting bolts securing the thermostat housing cover using the appropriate wrench or socket. Keep track of all fasteners.\u003c\/li\u003e\n\u003cli\u003eCarefully lift the housing cover and remove the old thermostat and seal. Inspect the housing for corrosion or debris and clean thoroughly.\u003c\/li\u003e\n\u003cli\u003eInstall the new rubber seal ring into the groove of the thermostat housing. Ensure it seats properly without twisting or pinching.\u003c\/li\u003e\n\u003cli\u003ePosition the new thermostat in the housing with the temperature-sensing element facing the correct direction (typically toward the engine block).\u003c\/li\u003e\n\u003cli\u003eReplace the housing cover and hand-tighten the mounting bolts. Then torque bolts to manufacturer specifications in a crisscross pattern to ensure even sealing.\u003c\/li\u003e\n\u003cli\u003eReconnect the battery if disconnected. Start the engine and allow it to reach operating temperature while monitoring for leaks around the thermostat housing.\u003c\/li\u003e\n\u003cli\u003eCheck coolant levels and top off if necessary. Verify that the engine temperature remains within normal operating range.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm this thermostat fits my Mercury Mariner outboard?\u003c\/strong\u003e\u003cbr\u003e\nA: Check your engine's serial number plate. This thermostat fits 2.5-3.5 HP models with serial 0R131842 \u0026amp; up, and 4-6 HP models with serial 0R411838 \u0026amp; up. Cross-reference your current part number with OEM 804540 or 853704.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs that my thermostat needs replacement?\u003c\/strong\u003e\u003cbr\u003e\nA: Common symptoms include engine overheating, failure to reach operating temperature, excessive steam from the cooling system, or coolant leaks around the thermostat housing. If your temperature gauge reads abnormally high or low, inspect the thermostat.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace the thermostat on my outboard?\u003c\/strong\u003e\u003cbr\u003e\nA: Thermostats should be inspected annually and replaced every 2-3 years or sooner if symptoms of failure appear. Always replace the rubber seal when installing a new thermostat to prevent leaks.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Does this kit include the gasket or seal?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes, this package includes both the thermostat and the rubber seal ring required for proper installation. No additional seals need to be purchased separately.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is this an OEM part or aftermarket?\u003c\/strong\u003e\u003cbr\u003e\nA: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How fast do you ship and how much does it cost?\u003c\/strong\u003e\u003cbr\u003e\nA: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is your warranty and return policy?\u003c\/strong\u003e\u003cbr\u003e\nA: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused \u0026amp; in original condition); please see our policy page or reach out for instructions.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eVerify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.\u003c\/li\u003e\n\u003cli\u003eThis product is an aftermarket replacement part and is not an OEM component.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended to ensure safety and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality Assured:\u003c\/strong\u003e As a trusted manufacturer for over 20 years, we supply top marine brands globally.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Global Shipping:\u003c\/strong\u003e Free delivery worldwide in 5–15 days.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect from Manufacturer:\u003c\/strong\u003e Competitive pricing without compromising quality.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":50579288228153,"sku":"23TH619","price":38.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/Thermostat_for_Tohatsu_Mercury_2-6_hp_4-St_3H6-01030-0_804540___345-01030-0_3H6-01030-0_-_JLM_MARINE-8291185.jpg?v=1755251566"},{"product_id":"mercury-9-9-hp-outboards-rebuild-decal-sticker-kit","title":"Mercury  9.9 HP Outboards Motor Top Cowl Cove Decal Sticker Set 826335A00, 12836A00, 803158A00, 895197A05 - JLM Marine","description":"\u003ch2\u003eReference Code\u003c\/h2\u003e\n\u003cp\u003eJLM Marine: 24DC800MB9.9, 24DC801MR9.9, 24DC802MB9.9; Mercury MerCruiser: 826335A00, 12836A00, 803158A00, 895197A05, 37-12836A96, 12836A94, 892904007, 892904008\u003c\/p\u003e\n\n\u003cp\u003eRestore your Mercury engine identification with this premium marine engine sticker set, designed as a direct replacement for outboard motor decals.\u003c\/p\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eMercury 9.9hp Engine Models: 1999-2006 Two Stroke (Ref: 12836A00), 2005-2006 Four Stroke Sea Pro Kicker (Ref: 895197A05), 1999-2004 Four Stroke (Ref: 826335A00), 1999-2004 Black Sailpower and Bigfoot (Ref: 803158A00)\u003c\/li\u003e\n  \u003cli\u003eMercury Top Cowl Cover Models: 852413T3, 852413T4, 854654A3, 854654A4, 825553A4, 825553A5, 9420T10, 9420A10, 9205A13, 9205A10, 9205A2, 9420T12, 8M0107153, 803580T06, 803580T08\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eProduct Use\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eEnsures compliance with regulations and emission-label requirements\u003c\/li\u003e\n  \u003cli\u003eReplaces faded or missing decals for clear engine identification and maintained resale value\u003c\/li\u003e\n  \u003cli\u003eDesigned for both fresh water and sea water environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eProduct Highlights\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Vinyl\u003c\/strong\u003e: UV- \u0026amp; salt-water-resistant.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExact OEM Fit\u003c\/strong\u003e: Pre-cut; no trimming.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEasy Application\u003c\/strong\u003e: Peel-and-stick.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFade-Resistant Print\u003c\/strong\u003e: Long-term colour stability.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProtective Laminate\u003c\/strong\u003e: Guards against fuel \u0026amp; solvents.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eProduct Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Quality\u003c\/strong\u003e: Manufactured to OEM specifications using the exact same material as the originals.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduction Standards\u003c\/strong\u003e: Produced in an ISO9002 certified factory.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuality Assured\u003c\/strong\u003e: Over 20 years serving top marine brands.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Shipping\u003c\/strong\u003e: Free delivery in 5-15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect from Manufacturer\u003c\/strong\u003e: Competitive pricing with no quality trade-off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDon't compromise on quality or performance. Choose \u003cstrong\u003eJLM MARINE\u003c\/strong\u003e for reliable, high-performance marine parts at unbeatable prices. \u003cstrong\u003eOrder now and experience the JLM difference!\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNeed help?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eClick the live support icon or email us your engine details for the right parts.\u003c\/p\u003e","brand":"JLM Marine","offers":[{"title":"9.9HP Four Stroke Blue","offer_id":50900347945273,"sku":"24DC802MB9.9","price":31.5,"currency_code":"USD","in_stock":true},{"title":"9.9HP Four Stroke Red","offer_id":50900347978041,"sku":"24DC801MR9.9","price":31.5,"currency_code":"USD","in_stock":true},{"title":"9.9HP Two Stroke Blue","offer_id":50900348010809,"sku":"24DC800MB9.9","price":31.5,"currency_code":"USD","in_stock":true},{"title":"9.9HP Two Stroke Red","offer_id":50900348043577,"sku":"24DC801MR9.9","price":31.5,"currency_code":"USD","in_stock":true},{"title":"9.9HP Two Stroke SeaPro Blue","offer_id":50900348076345,"sku":"24DC800MB9.9","price":31.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/1999-2006_Mercury_9.9_Hp_Two_Stroke_Decal_Set_12836A00.jpg?v=1754990698"},{"product_id":"mercury-inline-fuel-filter-fits-mercury-mariner-9-9-50hp-outboards-replaces-35-8m0088825-853733a2-853733t02-853733t03-898101t68","title":"35-853733A2 Fuel Filter for Mercury Tohatsu 25HP 30HP 40HP | JLM Marine","description":"\u003ch2\u003e35-853733A2 Fuel Filter for Mercury Tohatsu 25HP 30HP 40HP | JLM Marine\u003c\/h2\u003e\n\n\u003cp\u003eThis high-quality aftermarket fuel filter is engineered to fit Mercury and Tohatsu outboard engines from 25HP to 40HP, covering both 2-cylinder and 3-cylinder configurations in carbureted and EFI models. It ensures reliable fuel filtration to protect your engine from contaminants and maintain optimal performance.\u003c\/p\u003e\n\n\u003cp\u003eThis filter directly replaces Mercury Mercruiser Quicksilver part numbers \u003cstrong\u003e35-853733A1\u003c\/strong\u003e, \u003cstrong\u003e853733A2\u003c\/strong\u003e, \u003cstrong\u003e35-853733A03\u003c\/strong\u003e, and Tohatsu Nissan part numbers \u003cstrong\u003e346-02230-0\u003c\/strong\u003e, \u003cstrong\u003e3B7-02230-0\u003c\/strong\u003e, \u003cstrong\u003e3AD-02230-0\u003c\/strong\u003e, among others, providing broad cross-brand compatibility.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eCompatible with both EFI (Electronic Fuel Injection) and carbureted engine systems\u003c\/li\u003e\n  \u003cli\u003eFits 2-cylinder and 3-cylinder outboard configurations\u003c\/li\u003e\n  \u003cli\u003eDirect replacement for multiple OEM part numbers across Mercury and Tohatsu brands\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n  \u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse:collapse; width:100%;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Mercruiser Quicksilver\u003c\/td\u003e\n        \u003ctd\u003e35-853733A1, 853733A1\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Mercruiser Quicksilver\u003c\/td\u003e\n        \u003ctd\u003e35-853733A2, 853733A2\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Mercruiser Quicksilver\u003c\/td\u003e\n        \u003ctd\u003e35-853733A03, 853733A03\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Mercruiser Quicksilver\u003c\/td\u003e\n        \u003ctd\u003e8M0088825, 35-8M0088825\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu Nissan\u003c\/td\u003e\n        \u003ctd\u003e346-02230-0\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu Nissan\u003c\/td\u003e\n        \u003ctd\u003e3B7-02230-0\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu Nissan\u003c\/td\u003e\n        \u003ctd\u003e3AD-02230-0\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\n\u003cp\u003eConfirm your engine model\/year in the table below. For Mercury owners, here's a guide to help you identify your engine's serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/mercury-outboard-serial-number-guide\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Serial Number Guide\u003c\/a\u003e. You can also review exploded diagrams to verify part numbers: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/diagrams\/mercury-parts-catalog\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Parts Diagrams \u0026amp; Catalog\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n  \u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse:collapse; width:100%;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eEngine Type\u003c\/th\u003e\n        \u003cth\u003eSerial Number Range\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eEFI 3 cyl\u003c\/td\u003e\n        \u003ctd\u003e25HP\u003c\/td\u003e\n        \u003ctd\u003eEFI\u003c\/td\u003e\n        \u003ctd\u003e0R106999 \u0026amp; Up\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eCarb SeaPro\u003c\/td\u003e\n        \u003ctd\u003e25HP\u003c\/td\u003e\n        \u003ctd\u003eCarbureted\u003c\/td\u003e\n        \u003ctd\u003e0R051710 \u0026amp; Up\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eEFI 3 cyl\u003c\/td\u003e\n        \u003ctd\u003e30HP\u003c\/td\u003e\n        \u003ctd\u003eEFI\u003c\/td\u003e\n        \u003ctd\u003e0R106999 \u0026amp; Up\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e2cyl\u003c\/td\u003e\n        \u003ctd\u003e25HP\u003c\/td\u003e\n        \u003ctd\u003eCarbureted\u003c\/td\u003e\n        \u003ctd\u003e0N055505 \u0026amp; UP\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e2cyl\u003c\/td\u003e\n        \u003ctd\u003e30HP\u003c\/td\u003e\n        \u003ctd\u003eCarbureted\u003c\/td\u003e\n        \u003ctd\u003e0N055505 \u0026amp; UP\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e3cyl\u003c\/td\u003e\n        \u003ctd\u003e40HP\u003c\/td\u003e\n        \u003ctd\u003eCarbureted\u003c\/td\u003e\n        \u003ctd\u003e0N055505 \u0026amp; UP\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e1 × Fuel Filter (35-853733A2)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n  \u003cli\u003eDisconnect the fuel line from the engine and relieve any residual fuel pressure in the system. Have a rag or container ready to catch any fuel spillage.\u003c\/li\u003e\n  \u003cli\u003eLocate the old fuel filter, typically positioned inline between the fuel tank and the engine. Note the direction of fuel flow indicated by the arrow on the old filter housing.\u003c\/li\u003e\n  \u003cli\u003eUse pliers or a wrench to loosen the hose clamps securing the fuel lines to the filter inlet and outlet. Carefully slide the fuel lines off the filter.\u003c\/li\u003e\n  \u003cli\u003eRemove the old fuel filter and inspect the fuel lines for cracks, wear, or damage. Replace hoses if necessary.\u003c\/li\u003e\n  \u003cli\u003eInstall the new fuel filter, ensuring the arrow on the filter body points in the direction of fuel flow (from tank to engine). Slide the fuel lines onto the filter inlet and outlet.\u003c\/li\u003e\n  \u003cli\u003eSecure the fuel lines with new or existing hose clamps, tightening them firmly to prevent leaks. Reconnect the fuel line to the engine.\u003c\/li\u003e\n  \u003cli\u003ePrime the fuel system by squeezing the primer bulb until it becomes firm. Start the engine and check for leaks around the filter connections.\u003c\/li\u003e\n  \u003cli\u003eAllow the engine to run for a few minutes and inspect the filter area again. If any leaks are detected, shut off the engine and re-tighten the clamps.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm this fuel filter fits my Mercury or Tohatsu engine?\u003c\/strong\u003e\u003cbr\u003e\nA: Check the compatible engine models table above for your horsepower, cylinder count, and serial number range. You can also cross-reference your original part number with the part number table to ensure compatibility.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace my outboard fuel filter?\u003c\/strong\u003e\u003cbr\u003e\nA: Replace your fuel filter every 100 hours of operation or annually, whichever comes first. If you notice performance issues like rough idling, hard starting, or loss of power, inspect and replace the filter immediately.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs of a clogged or failing fuel filter?\u003c\/strong\u003e\u003cbr\u003e\nA: Common symptoms include difficulty starting the engine, sputtering or stalling at high RPM, reduced top speed, and poor acceleration. A visual inspection may reveal debris or discoloration inside the filter housing.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I use this filter on both carbureted and EFI engines?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes, this fuel filter is designed to fit both carbureted and EFI (Electronic Fuel Injection) Mercury and Tohatsu outboards within the specified horsepower and serial number ranges.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is this an OEM part or an aftermarket replacement?\u003c\/strong\u003e\u003cbr\u003e\nA: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How fast do you ship and how much does it cost?\u003c\/strong\u003e\u003cbr\u003e\nA: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is your warranty and return policy?\u003c\/strong\u003e\u003cbr\u003e\nA: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused \u0026amp; in original condition); please see our policy page or reach out for instructions.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003eVerify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.\u003c\/li\u003e\n  \u003cli\u003eThis product is an aftermarket replacement part and is not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended to ensure safety and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuality Assured:\u003c\/strong\u003e As a trusted manufacturer for over 20 years, we supply top marine brands globally.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Shipping:\u003c\/strong\u003e Free delivery worldwide in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect from Manufacturer:\u003c\/strong\u003e Competitive pricing without compromising quality.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":51083506188601,"sku":"23FF681","price":17.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/35-8M0088825_2.jpg?v=1755257076"},{"product_id":"345-65021-0-water-pump-impeller-for-nissan-tohatsu-jlm-marine","title":"345-65021-0 Water Pump Impeller for Nissan Tohatsu | JLM Marine","description":"\u003ch2\u003eWater Pump Impeller for Nissan Tohatsu 25-40 HP Outboard Engines | OEM 345-65021-0\u003c\/h2\u003e\n\n\u003cp\u003eThis high-quality aftermarket water pump impeller is designed to fit \u003cstrong\u003eNissan and Tohatsu 25 HP, 30 HP, 35 HP, and 40 HP outboard engines\u003c\/strong\u003e, including both 2-stroke and 4-stroke models. Engineered to OEM specifications, it ensures reliable cooling system performance and is compatible with a wide range of engine series from 1996 through 2017.\u003c\/p\u003e\n\n\u003cp\u003eThe impeller directly replaces OEM part numbers \u003cstrong\u003e345-65021-0\u003c\/strong\u003e, \u003cstrong\u003e345650210\u003c\/strong\u003e, and \u003cstrong\u003e345650210M\u003c\/strong\u003e, providing a precise fit for designated Nissan and Tohatsu outboard motors. It is manufactured from durable neoprene with a nylon hub for long-lasting operation in marine environments.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage includes:\u003c\/strong\u003e \u003cspan style=\"color:red;\"\u003eOutboard Rubber Impeller with Key\/Pin\u003c\/span\u003e\n\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Neoprene with Nylon Hub for durability and heat resistance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInstallation tip:\u003c\/strong\u003e Lubricate with silicone grease, glycerin, or dish soap during installation (lubricant not included)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eBrand\u003c\/th\u003e\n      \u003cth\u003ePart Number\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eNissan \/ Tohatsu\u003c\/td\u003e\n      \u003ctd\u003e345-65021-0\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eNissan \/ Tohatsu\u003c\/td\u003e\n      \u003ctd\u003e345650210\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eNissan \/ Tohatsu\u003c\/td\u003e\n      \u003ctd\u003e345650210M\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n  \u003ctable\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eYear\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNissan\u003c\/td\u003e\n        \u003ctd\u003eNS25C2\u003c\/td\u003e\n        \u003ctd\u003e25 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2002\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNissan\u003c\/td\u003e\n        \u003ctd\u003eNS25C3\u003c\/td\u003e\n        \u003ctd\u003e25 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2002, 2003, 2005\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNissan\u003c\/td\u003e\n        \u003ctd\u003eNS30A3\u003c\/td\u003e\n        \u003ctd\u003e30 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2002\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNissan\u003c\/td\u003e\n        \u003ctd\u003eNS30A4\u003c\/td\u003e\n        \u003ctd\u003e30 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2002, 2003\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNissan\u003c\/td\u003e\n        \u003ctd\u003eNS35C\u003c\/td\u003e\n        \u003ctd\u003e35 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2002\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNissan\u003c\/td\u003e\n        \u003ctd\u003eNS40C2\u003c\/td\u003e\n        \u003ctd\u003e40 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2002\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNissan\u003c\/td\u003e\n        \u003ctd\u003eNS40C\u003c\/td\u003e\n        \u003ctd\u003e40 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2004\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNissan\u003c\/td\u003e\n        \u003ctd\u003eNSF25A\u003c\/td\u003e\n        \u003ctd\u003e25 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2002, 2003, 2004, 2005\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNissan\u003c\/td\u003e\n        \u003ctd\u003eNSF25B\u003c\/td\u003e\n        \u003ctd\u003e25 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNissan\u003c\/td\u003e\n        \u003ctd\u003eNSF30A\u003c\/td\u003e\n        \u003ctd\u003e30 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2002, 2004, 2005\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNissan\u003c\/td\u003e\n        \u003ctd\u003eNSF30B\u003c\/td\u003e\n        \u003ctd\u003e30 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eM25C2\u003c\/td\u003e\n        \u003ctd\u003e25 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1996\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eM25C3\u003c\/td\u003e\n        \u003ctd\u003e25 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2002, 2003, 2005\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eMX25H\u003c\/td\u003e\n        \u003ctd\u003e25 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eM25H\u003c\/td\u003e\n        \u003ctd\u003e25 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003e25JET\u003c\/td\u003e\n        \u003ctd\u003e25 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eM30A3\u003c\/td\u003e\n        \u003ctd\u003e30 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1996\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eM30A4\u003c\/td\u003e\n        \u003ctd\u003e30 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2002, 2003\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eM30H\u003c\/td\u003e\n        \u003ctd\u003e30 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eMX30H\u003c\/td\u003e\n        \u003ctd\u003e30 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eM35\u003c\/td\u003e\n        \u003ctd\u003e35 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eM35C\u003c\/td\u003e\n        \u003ctd\u003e35 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2002\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eM40C\u003c\/td\u003e\n        \u003ctd\u003e40 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1996, 2004\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eMFS25A\u003c\/td\u003e\n        \u003ctd\u003e25 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2002, 2003, 2004, 2005\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eMFS25B\u003c\/td\u003e\n        \u003ctd\u003e25 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eMFS25C\u003c\/td\u003e\n        \u003ctd\u003e25 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2015, 2016, 2017\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eMFS30A\u003c\/td\u003e\n        \u003ctd\u003e30 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2002, 2003, 2004, 2005\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eMFS30B\u003c\/td\u003e\n        \u003ctd\u003e30 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2005, 2006, 2008, 2009, 2010, 2011, 2012, 2013, 2014\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eMFS30C\u003c\/td\u003e\n        \u003ctd\u003e30 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2015, 2016, 2017\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eSpecification\u003c\/th\u003e\n      \u003cth\u003eValue\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eNumber of Blades\u003c\/td\u003e\n      \u003ctd\u003e6\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eImpeller Diameter\u003c\/td\u003e\n      \u003ctd\u003e44.10 mm \/ 1.736 inch\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eImpeller Depth\u003c\/td\u003e\n      \u003ctd\u003e20.30 mm \/ 0.799 inch\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eShaft Diameter\u003c\/td\u003e\n      \u003ctd\u003e17.30 mm \/ 0.681 inch\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMaterial\u003c\/td\u003e\n      \u003ctd\u003eNeoprene with Nylon Hub\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eWeight\u003c\/td\u003e\n      \u003ctd\u003e10 g\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDisconnect the fuel line and remove the lower unit\u003c\/strong\u003e from the outboard motor following your engine's service manual.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRemove the water pump housing cover\u003c\/strong\u003e to access the old impeller. Take note of the impeller blade orientation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExtract the old impeller and key\/pin\u003c\/strong\u003e carefully; inspect the pump housing for debris, scoring, or corrosion.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClean the housing and shaft thoroughly\u003c\/strong\u003e with a suitable marine cleaner to remove salt deposits and residue.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLubricate the new impeller generously\u003c\/strong\u003e with silicone grease, glycerin, or dish soap to ease installation and prevent blade damage.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert the key\/pin into the drive shaft slot\u003c\/strong\u003e and align the new impeller blades in the correct rotational direction.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSlide the impeller onto the shaft\u003c\/strong\u003e gently, rotating it as needed to allow blades to compress into the housing.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReinstall the pump housing cover and gasket\u003c\/strong\u003e, ensuring all fasteners are torqued to manufacturer specifications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReattach the lower unit to the engine\u003c\/strong\u003e, aligning splines and shift linkage carefully.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReconnect the fuel line and water inlet\u003c\/strong\u003e, then test the cooling system by running the engine in a test tank or on muffs.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCheck for steady water flow from the tell-tale outlet\u003c\/strong\u003e within 15–30 seconds of engine start.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInspect all seals and connections for leaks\u003c\/strong\u003e, and verify normal operating temperature before returning to service.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace my water pump impeller?\u003c\/strong\u003e\u003cbr\u003e\nA: Most manufacturers recommend annual replacement or every 200–300 hours of operation, whichever comes first.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs that my impeller is failing?\u003c\/strong\u003e\u003cbr\u003e\nA: Common symptoms include weak or no water discharge from the tell-tale, engine overheating, steam from the powerhead, or reduced cooling performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I install this impeller dry?\u003c\/strong\u003e\u003cbr\u003e\nA: No. Always lubricate the impeller with silicone grease, glycerin, or dish soap before installation to prevent blade damage.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003eThis product is an aftermarket replacement part and is not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended to ensure safety and optimal performance.\u003c\/li\u003e\n  \u003cli\u003eVerify that the product images and specifications match your original part before purchasing.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":51940933992761,"sku":"17IT003K","price":15.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/12_0da0d85a-5488-40cc-9f68-b3cd5bbcdfc9.jpg?v=1771121388"},{"product_id":"3c8-65021-2-water-pump-impeller-for-nissan-tohatsu-40d-50d-jlm-marine","title":"3C8-65021-2 Water Pump Impeller for Nissan Tohatsu 40D 50D | JLM Marine","description":"\u003ch2\u003eWater Pump Impeller for Nissan Tohatsu 40D 50D – OEM 3C8-65021-2 Replacement\u003c\/h2\u003e\n\n\u003cp\u003eThis water pump impeller is designed for \u003cstrong\u003eNissan and Tohatsu 2-Stroke 40D and 50D outboard engines\u003c\/strong\u003e. Engineered to deliver reliable cooling performance, it ensures your engine operates at optimal temperatures during every outing.\u003c\/p\u003e\n\n\u003cp\u003eThis aftermarket impeller directly replaces OEM part numbers \u003cstrong\u003e3C8-65021-2\u003c\/strong\u003e, 3C8650212, and 3C8650212M, providing a cost-effective solution without compromising on quality or fitment.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eIncludes impeller with key\/pin for complete installation\u003c\/li\u003e\n  \u003cli\u003eConstructed from durable \u003cstrong\u003eneoprene with nylon hub\u003c\/strong\u003e for long-lasting performance\u003c\/li\u003e\n  \u003cli\u003e6-blade design for efficient water flow and cooling\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eBrand\u003c\/th\u003e\n      \u003cth\u003ePart Number\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eNissan \/ Tohatsu\u003c\/td\u003e\n      \u003ctd\u003e3C8-65021-2\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eNissan \/ Tohatsu\u003c\/td\u003e\n      \u003ctd\u003e3C8650212\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eNissan \/ Tohatsu\u003c\/td\u003e\n      \u003ctd\u003e3C8650212M\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n  \u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eYears\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNissan \/ Tohatsu\u003c\/td\u003e\n        \u003ctd\u003eMD40A, MD40B, NSD40A, NSD40B, NSD40B2, M40D2, NS40D2, MFS40A, NSF40A\u003c\/td\u003e\n        \u003ctd\u003e40 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2002-2017\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNissan \/ Tohatsu\u003c\/td\u003e\n        \u003ctd\u003eMD50A, MD50B, MD50B2, NSD50A, NSD50B, NSD50B2, NS50D2, M50D2, NSF50A, MFS50A\u003c\/td\u003e\n        \u003ctd\u003e50 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2002-2017\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eSpecification\u003c\/th\u003e\n      \u003cth\u003eValue\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eOEM Part Number\u003c\/td\u003e\n      \u003ctd\u003e3C8-65021-2\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eNumber of Blades\u003c\/td\u003e\n      \u003ctd\u003e6\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eOverall Diameter\u003c\/td\u003e\n      \u003ctd\u003e50.40 mm \/ 1.99 inch\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eShaft Diameter\u003c\/td\u003e\n      \u003ctd\u003e17.20 mm \/ 0.68 inch\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMaterial\u003c\/td\u003e\n      \u003ctd\u003eNeoprene with Nylon Hub\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eWeight\u003c\/td\u003e\n      \u003ctd\u003e20 g\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003eOutboard Rubber Impeller with Key \/ Pin\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n  \u003cli\u003eDisconnect the fuel line and remove the lower unit from the outboard motor according to your engine's service manual.\u003c\/li\u003e\n  \u003cli\u003eRemove the water pump housing cover by loosening the mounting bolts.\u003c\/li\u003e\n  \u003cli\u003eCarefully extract the old impeller from the pump housing, noting its orientation and blade direction.\u003c\/li\u003e\n  \u003cli\u003eClean the pump housing thoroughly, removing any debris, old gasket material, or corrosion.\u003c\/li\u003e\n  \u003cli\u003eLubricate the new impeller with water pump grease or soapy water to ease installation.\u003c\/li\u003e\n  \u003cli\u003eInsert the key\/pin into the shaft slot, ensuring it is properly seated.\u003c\/li\u003e\n  \u003cli\u003eInstall the new impeller onto the shaft, aligning the blades in the correct rotation direction (refer to your service manual).\u003c\/li\u003e\n  \u003cli\u003eGently rotate the impeller to ensure all blades flex correctly and fit snugly inside the housing.\u003c\/li\u003e\n  \u003cli\u003eReplace the pump housing cover with a new gasket and tighten bolts evenly to the specified torque.\u003c\/li\u003e\n  \u003cli\u003eReinstall the lower unit onto the outboard motor, ensuring all connections are secure.\u003c\/li\u003e\n  \u003cli\u003eReconnect the fuel line and perform a water flow test by running the engine with the cooling system flushed.\u003c\/li\u003e\n  \u003cli\u003eInspect for proper water discharge from the tell-tale outlet and check for leaks around the pump housing.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm this impeller fits my Nissan or Tohatsu engine?\u003c\/strong\u003e\u003cbr\u003e\nA: Check the Compatible Engine Models table above for your specific model and year (2002-2017). Additionally, compare the impeller dimensions—6 blades, 50.40 mm diameter, 17.20 mm shaft—with your original part to ensure a perfect match.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace my water pump impeller?\u003c\/strong\u003e\u003cbr\u003e\nA: Most manufacturers recommend replacing the impeller every 2–3 years or 200–300 hours of operation, whichever comes first. If you notice overheating, reduced water flow from the tell-tale, or visible cracks\/damage on the impeller blades, replace it immediately.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs of a failing water pump impeller?\u003c\/strong\u003e\u003cbr\u003e\nA: Common symptoms include engine overheating, weak or no water discharge from the tell-tale outlet, steam from the engine, and reduced performance. Inspect the impeller regularly for cracked, worn, or missing blades.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I install this impeller myself or do I need a mechanic?\u003c\/strong\u003e\u003cbr\u003e\nA: If you have basic mechanical skills and the proper tools, you can install it yourself by following the service manual. However, professional installation is recommended to ensure the cooling system operates correctly and to avoid potential engine damage.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is this an OEM or aftermarket impeller?\u003c\/strong\u003e\u003cbr\u003e\nA: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How fast do you ship and how much does it cost?\u003c\/strong\u003e\u003cbr\u003e\nA: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is your warranty and return policy?\u003c\/strong\u003e\u003cbr\u003e\nA: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused \u0026amp; in original condition); please see our policy page or reach out for instructions.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003eVerify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.\u003c\/li\u003e\n  \u003cli\u003eThis product is an aftermarket replacement part and is not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended to ensure safety and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuality Assured:\u003c\/strong\u003e As a trusted manufacturer for over 20 years, we supply top marine brands globally.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Shipping:\u003c\/strong\u003e Free delivery worldwide in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect from Manufacturer:\u003c\/strong\u003e Competitive pricing without compromising quality.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":51942482575673,"sku":"17IT007K","price":14.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/12_831a7e70-f507-4730-b78e-48e0bcea265e.jpg?v=1771172210"},{"product_id":"27-8m0089639-lower-unit-seal-kit-for-mercury-mariner-25hp-30hp-jlm-marine","title":"27-8M0089639 Lower Unit Seal Kit for Mercury Mariner 25HP 30HP | JLM Marine","description":"\u003ch2\u003eLower Unit Seal Kit – Fits Mercury Mariner 25-30HP 2-Stroke Outboards\u003c\/h2\u003e\n\n\u003cp\u003eThis lower unit seal kit is designed for Mercury Mariner 2-cylinder, 2-stroke outboards rated at \u003cstrong\u003e25HP\u003c\/strong\u003e and \u003cstrong\u003e30HP\u003c\/strong\u003e, including Jet models. It provides a complete sealing solution for lower unit maintenance and rebuilds on international models from serial number \u003cstrong\u003e0N055505\u003c\/strong\u003e and up.\u003c\/p\u003e\n\n\u003cp\u003eThis aftermarket replacement directly crosses to OEM part numbers \u003cstrong\u003e27-8M0089639\u003c\/strong\u003e, \u003cstrong\u003e27-8M0089636\u003c\/strong\u003e, \u003cstrong\u003e95220A1\u003c\/strong\u003e, and \u003cstrong\u003e804908A01\u003c\/strong\u003e, ensuring compatibility across multiple Mercury Mariner service part references.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eComplete seal kit with gasket for lower unit service\u003c\/li\u003e\n  \u003cli\u003eFits 2-cylinder, 2-stroke 25HP and 30HP models (including Jet configurations)\u003c\/li\u003e\n  \u003cli\u003eDirect replacement for multiple OEM part numbers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse:collapse; width:100%;\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eBrand\u003c\/th\u003e\n      \u003cth\u003ePart Number\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMercury Mariner\u003c\/td\u003e\n      \u003ctd\u003e27-8M0089639\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMercury Mariner\u003c\/td\u003e\n      \u003ctd\u003e27-8M0089636\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMercury Mariner\u003c\/td\u003e\n      \u003ctd\u003e95220A1\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMercury Mariner\u003c\/td\u003e\n      \u003ctd\u003e804908A01\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\n\u003cp\u003eConfirm your engine model\/year in the table below. For Mercury owners, here's a guide to help you identify your engine's serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/mercury-outboard-serial-number-guide\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Serial Number Guide\u003c\/a\u003e. You can also review exploded diagrams to verify part numbers: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/diagrams\/mercury-parts-catalog\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Parts Diagrams \u0026amp; Catalog\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n  \u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse:collapse; width:100%;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Mariner\u003c\/td\u003e\n        \u003ctd\u003e25 (2 CYL.)(International)\u003c\/td\u003e\n        \u003ctd\u003e25HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003eSerial 0N055505 \u0026amp; Up\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Mariner\u003c\/td\u003e\n        \u003ctd\u003e25 Jet (2 CYL.)(International)\u003c\/td\u003e\n        \u003ctd\u003e25HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003eSerial 0N088578 \u0026amp; Up\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Mariner\u003c\/td\u003e\n        \u003ctd\u003e30 (2 CYL.)(International)\u003c\/td\u003e\n        \u003ctd\u003e30HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003eSerial 0N055505 \u0026amp; Up\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse:collapse; width:100%;\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eSpecification\u003c\/th\u003e\n      \u003cth\u003eValue\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eProduct Type\u003c\/td\u003e\n      \u003ctd\u003eLower Unit Seal Kit\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eEngine Type\u003c\/td\u003e\n      \u003ctd\u003e2-Cylinder, 2-Stroke\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCompatible HP\u003c\/td\u003e\n      \u003ctd\u003e25HP, 30HP\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eApplication\u003c\/td\u003e\n      \u003ctd\u003eMercury Mariner Outboard Lower Unit\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\n\u003cp\u003eThis kit includes the following components:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e1 x Lower Unit Seal Kit with Gasket\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n  \u003cli\u003eDisconnect the outboard from the power source and secure the motor in a stable position. Remove the lower unit from the gear housing following your service manual.\u003c\/li\u003e\n  \u003cli\u003eDrain all gear oil completely and inspect for contamination or metal debris. Clean all mating surfaces thoroughly with a suitable solvent.\u003c\/li\u003e\n  \u003cli\u003eRemove the old seals, gaskets, and O-rings from the lower unit housing. Inspect bearing surfaces and shift components for wear or damage.\u003c\/li\u003e\n  \u003cli\u003eInstall new seals from the kit using a seal driver or appropriately sized socket. Ensure each seal seats squarely without cocking or distortion.\u003c\/li\u003e\n  \u003cli\u003eApply a thin layer of marine-grade grease to seal lips before assembly. Position the new gasket carefully, ensuring all bolt holes align.\u003c\/li\u003e\n  \u003cli\u003eReassemble the lower unit to the gear housing, torquing all fasteners to manufacturer specifications. Refill with the correct grade and quantity of gear oil.\u003c\/li\u003e\n  \u003cli\u003eCheck for proper shift engagement and smooth operation before returning the outboard to service. Test run and inspect for leaks.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm this seal kit fits my Mercury Mariner outboard?\u003c\/strong\u003e\u003cbr\u003e\nA: Verify your engine model, HP rating, and serial number against the compatibility table above. Models must be 2-cylinder, 2-stroke, 25HP or 30HP (including Jet) with serial numbers 0N055505 and up (0N088578 for Jet models). Cross-reference your current seal kit part number with 27-8M0089639, 27-8M0089636, 95220A1, or 804908A01.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs that my lower unit seals need replacement?\u003c\/strong\u003e\u003cbr\u003e\nA: Common symptoms include gear oil leaking from the lower unit, water contamination in the gear oil (milky appearance), difficulty shifting gears, or unusual noise from the lower unit during operation. Regular inspection during seasonal maintenance is recommended.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace lower unit seals?\u003c\/strong\u003e\u003cbr\u003e\nA: Replace seals during lower unit rebuilds, whenever the lower unit is disassembled for service, or if you observe leaks or water intrusion. Many mechanics recommend inspecting seals annually and replacing them every 2-3 years or 200-300 hours of operation, depending on usage conditions.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I use this aftermarket seal kit instead of the OEM Mercury part?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes, this aftermarket seal kit is manufactured to OEM specifications and provides equivalent sealing performance. It directly replaces OEM part numbers 27-8M0089639, 27-8M0089636, 95220A1, and 804908A01. Many marine technicians use quality aftermarket seals for routine maintenance and rebuilds.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: OEM vs. Aftermarket?\u003c\/strong\u003e\u003cbr\u003e\nA: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How fast do you ship and how much does it cost?\u003c\/strong\u003e\u003cbr\u003e\nA: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is your warranty and return policy?\u003c\/strong\u003e\u003cbr\u003e\nA: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused \u0026amp; in original condition); please see our policy page or reach out for instructions.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003eVerify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.\u003c\/li\u003e\n  \u003cli\u003eThis product is an aftermarket replacement part and is not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended to ensure safety and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuality Assured:\u003c\/strong\u003e As a trusted manufacturer for over 20 years, we supply top marine brands globally.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Shipping:\u003c\/strong\u003e Free delivery worldwide in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect from Manufacturer:\u003c\/strong\u003e Competitive pricing without compromising quality.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":51981022232889,"sku":"24MSK722","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/Sbb011fcbaac2412d93b2dd8b32924560B.jpg_200x200_75bbd836-3429-4c9a-8924-fd941c5f0518.webp?v=1772448289"},{"product_id":"17-95372-18-95295-12-8035161-26-95348-25-16131-27-95220-prop-shaft-seal-kit-with-shear-pin-for-mercury-mariner-2-5hp-3-3hp-jlm-marine","title":"17-95372 18-95295 12-8035161 26-95348 25-16131 27-95220 Prop Shaft Seal Kit with Shear Pin for Mercury Mariner 2.5HP 3.3HP | JLM Marine","description":"\u003ch2\u003eProp Shaft Seal Kit with Shear Pin – Fits Mercury Mariner 2.5HP \u0026amp; 3.3HP Outboard Motors\u003c\/h2\u003e\n\n\u003cp\u003eThis comprehensive prop shaft seal kit is designed for \u003cstrong\u003eMercury Mariner 2.5HP and 3.3HP 4-stroke outboard engines\u003c\/strong\u003e with serial number \u003cstrong\u003e0R131842 or higher\u003c\/strong\u003e. It provides all the essential seals, gaskets, and pins needed to service your lower gearcase unit and maintain optimal propeller shaft performance.\u003c\/p\u003e\n\n\u003cp\u003eThis kit directly replaces OEM part numbers \u003cstrong\u003e17-95372, 18-95295, 12-8035161, 26-95348, 25-16131, and 27-95220\u003c\/strong\u003e, offering a complete solution for lower unit maintenance in a single package.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eIncludes oil seal, gaskets, o-ring, shear pins, and cotter pin for complete lower unit service\u003c\/li\u003e\n  \u003cli\u003eCompatible with Mercury Mariner 4-stroke outboards (serial 0R131842+)\u003c\/li\u003e\n  \u003cli\u003eDirect replacement for multiple OEM part numbers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eBrand\u003c\/th\u003e\n      \u003cth\u003ePart Number\u003c\/th\u003e\n      \u003cth\u003eNotes\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMercury\u003c\/td\u003e\n      \u003ctd\u003e17-95372, 17-815111, 17-815111002, 17-815111Q02\u003c\/td\u003e\n      \u003ctd\u003eProp Shaft Shear Pin\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMercury\u003c\/td\u003e\n      \u003ctd\u003e18-95295, 18-95295Q\u003c\/td\u003e\n      \u003ctd\u003ePropeller Nut Cotter Pin\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMercury\u003c\/td\u003e\n      \u003ctd\u003e26-95348\u003c\/td\u003e\n      \u003ctd\u003eOil Seal\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMercury\u003c\/td\u003e\n      \u003ctd\u003e25-16131\u003c\/td\u003e\n      \u003ctd\u003eO-ring\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMercury\u003c\/td\u003e\n      \u003ctd\u003e27-95220\u003c\/td\u003e\n      \u003ctd\u003eDrain Gasket\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMercury\u003c\/td\u003e\n      \u003ctd\u003e12-8035161\u003c\/td\u003e\n      \u003ctd\u003eGasket\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\n\u003cp\u003eConfirm your engine model\/year in the table below. For Mercury owners, here's a guide to help you identify your engine's serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/mercury-outboard-serial-number-guide\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Serial Number Guide\u003c\/a\u003e. You can also review exploded diagrams to verify part numbers: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/diagrams\/mercury-parts-catalog\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Parts Diagrams \u0026amp; Catalog\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eBrand\u003c\/th\u003e\n      \u003cth\u003eModel\u003c\/th\u003e\n      \u003cth\u003eRated HP\u003c\/th\u003e\n      \u003cth\u003eStroke\u003c\/th\u003e\n      \u003cth\u003eNotes\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMercury Mariner\u003c\/td\u003e\n      \u003ctd\u003e2.5HP \u0026amp; 3.3HP\u003c\/td\u003e\n      \u003ctd\u003e2.5HP, 3.3HP\u003c\/td\u003e\n      \u003ctd\u003e4-Stroke\u003c\/td\u003e\n      \u003ctd\u003eSerial number 0R131842 or higher\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eSpecification\u003c\/th\u003e\n      \u003cth\u003eValue\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eApplication\u003c\/td\u003e\n      \u003ctd\u003eLower Gearcase Unit \/ Prop Shaft Service\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eEngine Type\u003c\/td\u003e\n      \u003ctd\u003e4-Stroke Outboard\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCompatible HP\u003c\/td\u003e\n      \u003ctd\u003e2.5HP, 3.3HP\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eSerial Number Range\u003c\/td\u003e\n      \u003ctd\u003e0R131842 or higher\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eKit Type\u003c\/td\u003e\n      \u003ctd\u003eComplete Seal \u0026amp; Pin Kit\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\n\u003cp\u003eThis comprehensive kit includes all components needed for lower unit prop shaft service:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e2 x Shear Pin\u003c\/strong\u003e\u003c\/span\u003e (17-95372)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1 x Cotter Pin\u003c\/strong\u003e (18-95295)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1 x Oil Seal\u003c\/strong\u003e (26-95348)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1 x Gasket\u003c\/strong\u003e (12-8035161)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1 x O-ring\u003c\/strong\u003e (25-16131)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2 x Drain Gasket\u003c\/strong\u003e (27-95220)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePreparation:\u003c\/strong\u003e Disconnect the spark plug wire and remove the propeller nut and washer. Inspect the old cotter pin and remove it carefully.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRemove Propeller:\u003c\/strong\u003e Slide the propeller off the shaft. Check for fishing line or debris around the shaft and clean thoroughly.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInspect Shear Pin:\u003c\/strong\u003e Examine the existing shear pin for damage or shearing. If broken, remove both halves completely from the prop shaft.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReplace Oil Seal:\u003c\/strong\u003e Carefully pry out the old oil seal from the lower unit housing using a seal puller or flat tool. Clean the seal bore and press in the new seal evenly until seated.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInstall Gaskets \u0026amp; O-ring:\u003c\/strong\u003e Remove old drain gaskets and install new ones on drain\/fill plugs. Replace the o-ring as needed during lower unit service.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInstall New Shear Pin:\u003c\/strong\u003e Align the propeller hub with the shaft and insert the new shear pin through the aligned holes. Ensure it passes completely through both sides.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReinstall Propeller:\u003c\/strong\u003e Slide the propeller back onto the shaft, ensuring the shear pin is properly seated. Install the washer and propeller nut.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSecure with Cotter Pin:\u003c\/strong\u003e Insert the new cotter pin through the propeller nut castle slots and shaft hole. Bend the pin ends outward to lock in place.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinal Check:\u003c\/strong\u003e Verify all components are tight and secure. Rotate the propeller by hand to ensure smooth operation with no binding.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReconnect \u0026amp; Test:\u003c\/strong\u003e Reconnect the spark plug wire. Test the engine in a controlled environment before full operation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How do I know if my shear pin is damaged?\u003c\/strong\u003e\u003cbr\u003e\nA: If your propeller spins freely without engaging forward\/reverse thrust, or if you hear unusual rattling from the lower unit, the shear pin has likely sheared. Remove the propeller to inspect—a broken pin will be visibly damaged or missing.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace the seals and gaskets in this kit?\u003c\/strong\u003e\u003cbr\u003e\nA: Replace the oil seal and gaskets during routine lower unit service (typically every 100 hours or annually). Replace shear pins immediately when broken, and inspect drain gaskets whenever changing lower unit oil.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Will this kit fit Mercury Mariner 2-stroke engines?\u003c\/strong\u003e\u003cbr\u003e\nA: No, this kit is specifically designed for \u003cstrong\u003e4-stroke Mercury Mariner 2.5HP and 3.3HP engines with serial number 0R131842 or higher\u003c\/strong\u003e. Verify your engine model and serial number before purchasing.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What's the difference between the shear pins included and OEM pins?\u003c\/strong\u003e\u003cbr\u003e\nA: These aftermarket shear pins are manufactured to OEM specifications with comparable materials and shear strength. They provide the same protective function—breaking under impact to prevent costly lower unit damage.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I reuse the old cotter pin?\u003c\/strong\u003e\u003cbr\u003e\nA: No, cotter pins should never be reused. Once bent, they lose their structural integrity and may fail to secure the propeller nut properly, creating a safety hazard.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is this an OEM product or aftermarket?\u003c\/strong\u003e\u003cbr\u003e\nA: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How fast do you ship and how much does it cost?\u003c\/strong\u003e\u003cbr\u003e\nA: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is your warranty and return policy?\u003c\/strong\u003e\u003cbr\u003e\nA: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused \u0026amp; in original condition); please see our policy page or reach out for instructions.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003eVerify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.\u003c\/li\u003e\n  \u003cli\u003eThis product is an aftermarket replacement part and is not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended to ensure safety and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuality Assured:\u003c\/strong\u003e As a trusted manufacturer for over 20 years, we supply top marine brands globally.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Shipping:\u003c\/strong\u003e Free delivery worldwide in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect from Manufacturer:\u003c\/strong\u003e Competitive pricing without compromising quality.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":51981023150393,"sku":"24PK067","price":20.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/12_f0dab45b-421b-4acb-8162-3f3be09b8964.jpg?v=1772414764"},{"product_id":"8m0181314-maintenance-kit-for-mercury-2-5hp-3-5hp-jlm-marine","title":"8M0181314 Maintenance Kit for Mercury 2.5HP 3.5HP | JLM Marine","description":"\u003ch2\u003e8M0181314 Maintenance Kit for Mercury 2.5HP 3.5HP\u003c\/h2\u003e\n\n\u003cp\u003eThis comprehensive maintenance kit is designed specifically for Mercury 2.5HP and 3.5HP carbureted outboard engines with serial numbers 0R131842 and above. It contains all the essential service components needed for a complete routine maintenance overhaul, ensuring optimal engine performance and longevity.\u003c\/p\u003e\n\n\u003cp\u003eThis kit directly replaces OEM part number \u003cstrong\u003e8M0181314\u003c\/strong\u003e, providing a complete solution for water pump, fuel system, and lower unit servicing in a single package.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eIncludes complete water pump rebuild components (impeller, gaskets, guide plate, and insert)\u003c\/li\u003e\n\u003cli\u003eFeatures fuel filter, thermostat, and oil seal for comprehensive engine maintenance\u003c\/li\u003e\n\u003cli\u003eContains all necessary gaskets, O-rings, pins, and gear oil pump for lower unit service\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e8M0181314\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\n\u003cp\u003eConfirm your engine model\/year in the table below. For Mercury owners, here's a guide to help you identify your engine's serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/mercury-outboard-serial-number-guide\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Serial Number Guide\u003c\/a\u003e. You can also review exploded diagrams to verify part numbers: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/diagrams\/mercury-parts-catalog\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Parts Diagrams \u0026amp; Catalog\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003eCarbureted Outboards\u003c\/td\u003e\n\u003ctd\u003e2.5 \/ 3.5 HP\u003c\/td\u003e\n\u003ctd\u003eSerial Number 0R131842 \u0026amp; Above\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOEM Number\u003c\/td\u003e\n\u003ctd\u003e8M0181314\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Horsepower\u003c\/td\u003e\n\u003ctd\u003e2.5 HP \/ 3.5 HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngine Type\u003c\/td\u003e\n\u003ctd\u003eCarbureted Outboards\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSerial Number Range\u003c\/td\u003e\n\u003ctd\u003e0R131842 \u0026amp; Above\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\n\u003cp\u003eThis maintenance kit includes the following components:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e161603\u003c\/strong\u003e (Gasket) × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e161588\u003c\/strong\u003e (Gasket) × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e161591\u003c\/strong\u003e (Guide Plate) × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e161571\u003c\/strong\u003e (Insert) × 1\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e161543\u003c\/strong\u003e (Impeller) × 1\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e16155\u003c\/strong\u003e (Pin) × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e804540\u003c\/strong\u003e (Thermostat) × 1\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e35-8M0157133\u003c\/strong\u003e (Fuel Filter) × 1\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8035161\u003c\/strong\u003e (Gasket) × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e26-95348\u003c\/strong\u003e (Oil Seal) × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e25-16131\u003c\/strong\u003e (O-ring) × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e27-95220\u003c\/strong\u003e (Drain Gasket) × 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e17-815111Q02\u003c\/strong\u003e (Pin) × 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e95295\u003c\/strong\u003e (Cotter Pin) × 1\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e24OP149\u003c\/strong\u003e (Gear Oil Pump) × 1\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n\u003cli\u003eDisconnect the fuel line and remove the lower unit from the outboard engine following manufacturer guidelines. Drain all gear oil completely.\u003c\/li\u003e\n\u003cli\u003eRemove the water pump housing and discard the old impeller, gaskets, guide plate, and insert. Clean all surfaces thoroughly to remove debris and old gasket material.\u003c\/li\u003e\n\u003cli\u003eInstall the new insert (161571) into the water pump housing, ensuring proper orientation. Place the new guide plate (161591) on top.\u003c\/li\u003e\n\u003cli\u003eLubricate the new impeller (161543) with glycerin or soapy water, then install it onto the driveshaft with blades oriented correctly. Secure with the new pin (16155).\u003c\/li\u003e\n\u003cli\u003ePosition the new gaskets (161603 and 161588) on the water pump housing, then reassemble the housing to the lower unit. Tighten fasteners to specified torque.\u003c\/li\u003e\n\u003cli\u003eReplace the old thermostat with the new unit (804540), ensuring the temperature-sensing element faces the correct direction. Install with new gasket (8035161).\u003c\/li\u003e\n\u003cli\u003eInstall the new fuel filter (35-8M0157133) in the fuel line, ensuring flow direction matches the arrow marking on the filter body.\u003c\/li\u003e\n\u003cli\u003eReplace the lower unit oil seal (26-95348) and O-ring (25-16131) at the driveshaft. Install new drain gaskets (27-95220) at oil drain and fill ports.\u003c\/li\u003e\n\u003cli\u003eUse the gear oil pump (24OP149) to refill the lower unit with the correct grade and quantity of gear oil until it overflows from the vent hole. Replace drain plugs with new gaskets.\u003c\/li\u003e\n\u003cli\u003eSecure all components with new pins (17-815111Q02) and cotter pin (95295) as specified in your engine's service manual.\u003c\/li\u003e\n\u003cli\u003eReattach the lower unit to the engine, reconnect the fuel line, and check all fasteners for proper torque.\u003c\/li\u003e\n\u003cli\u003eRun the engine in a test tank or on the water, checking for proper water pump discharge, no fuel leaks, and smooth operation before returning to full service.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm this kit fits my Mercury outboard?\u003c\/strong\u003e\u003cbr\u003e\nA: Verify that your engine is a 2.5HP or 3.5HP carbureted Mercury outboard with serial number 0R131842 or higher. Check your engine's serial number plate and cross-reference with the compatibility table above, or consult Mercury's parts diagrams using your model year.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace these maintenance components?\u003c\/strong\u003e\u003cbr\u003e\nA: Mercury recommends annual maintenance or every 100 hours of operation, whichever comes first. Replace the impeller annually regardless of appearance, as internal wear may not be visible. Inspect thermostats, seals, and gaskets during each service interval.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs that my water pump impeller needs replacement?\u003c\/strong\u003e\u003cbr\u003e\nA: Watch for reduced water flow from the telltale (pilot) stream, engine overheating, steam from the engine, or loss of power. If the engine temperature rises above normal or you notice weak discharge, replace the impeller immediately to prevent damage.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I reuse any of the old gaskets or seals during installation?\u003c\/strong\u003e\u003cbr\u003e\nA: No, always replace all gaskets, seals, and O-rings with the new components included in this kit. Reusing old gaskets can lead to leaks, improper sealing, and potential engine damage from water intrusion or oil loss.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Do I need any special tools to install this maintenance kit?\u003c\/strong\u003e\u003cbr\u003e\nA: Basic hand tools (screwdrivers, wrenches, pliers) are sufficient for most installations. A torque wrench is recommended for proper fastener tightening. The included gear oil pump (24OP149) simplifies lower unit oil refilling without additional equipment.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is this an OEM part or aftermarket replacement?\u003c\/strong\u003e\u003cbr\u003e\nA: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How fast do you ship and how much does it cost?\u003c\/strong\u003e\u003cbr\u003e\nA: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is your warranty and return policy?\u003c\/strong\u003e\u003cbr\u003e\nA: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused \u0026amp; in original condition); please see our policy page or reach out for instructions.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eVerify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.\u003c\/li\u003e\n\u003cli\u003eThis product is an aftermarket replacement part and is not an OEM component.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended to ensure safety and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality Assured:\u003c\/strong\u003e As a trusted manufacturer for over 20 years, we supply top marine brands globally.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Global Shipping:\u003c\/strong\u003e Free delivery worldwide in 5–15 days.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect from Manufacturer:\u003c\/strong\u003e Competitive pricing without compromising quality.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":52418259059001,"sku":"23KM770-4N","price":68.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/kit-23KM770-4N_1864322c-d076-4f1b-a0d5-1e6b8275d85a.png?v=1776686794"},{"product_id":"8m0181315-maintenance-kit-for-mercury-4hp-5hp-6hp-4-stroke-jlm-marine","title":"8M0181315 Maintenance Kit for Mercury 4HP 5HP 6HP 4-Stroke | JLM Marine","description":"\u003ch2\u003eMaintenance Kit for Mercury 4HP 5HP 6HP 4-Stroke Outboard Motors\u003c\/h2\u003e\n\n\u003cp\u003eThis comprehensive maintenance kit is specifically designed for Mercury 4-Stroke outboard motors rated at 4HP, 5HP, and 6HP with carbureted fuel systems. Engineered to fit models with serial numbers 0R411838 and above, this kit provides all essential service components to keep your engine running smoothly and reliably season after season.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eOEM Reference Number:\u003c\/strong\u003e 8M0181315. This aftermarket kit delivers the same specifications and quality as the original equipment, ensuring proper fit and performance for routine maintenance intervals.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eComplete service bundle including impeller, thermostat, fuel filter, seals, gaskets, and anode\u003c\/li\u003e\n\u003cli\u003eFits carbureted 4-stroke Mercury motors (4\/5\/6 HP, serial 0R411838 \u0026amp; above)\u003c\/li\u003e\n\u003cli\u003eIncludes specialized gear oil pump for convenient fluid changes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e8M0181315\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\n\u003cp\u003eConfirm your engine model\/year in the table below. For Mercury owners, here's a guide to help you identify your engine's serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/mercury-outboard-serial-number-guide\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Serial Number Guide\u003c\/a\u003e. You can also review exploded diagrams to verify part numbers: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/diagrams\/mercury-parts-catalog\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Parts Diagrams \u0026amp; Catalog\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003eCarbureted Motors\u003c\/td\u003e\n\u003ctd\u003e4 \/ 5 \/ 6 HP\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eSerial Number 0R411838 \u0026amp; Above\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOEM Part Number\u003c\/td\u003e\n\u003ctd\u003e8M0181315\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eMercury 4-Stroke Outboard Motors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor Rating\u003c\/td\u003e\n\u003ctd\u003e4HP \/ 5HP \/ 6HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel System\u003c\/td\u003e\n\u003ctd\u003eCarbureted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSerial Number Range\u003c\/td\u003e\n\u003ctd\u003e0R411838 \u0026amp; Above\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKit Type\u003c\/td\u003e\n\u003ctd\u003eComprehensive Maintenance Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\n\u003cp\u003eThis maintenance kit includes the following components for complete engine servicing:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Pump Components:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e161543 – Impeller × 1\u003c\/li\u003e\n\u003cli\u003e16160004 – Gasket × 1\u003c\/li\u003e\n\u003cli\u003e16158009 – Gasket × 1\u003c\/li\u003e\n\u003cli\u003e16156 – Gasket × 1\u003c\/li\u003e\n\u003cli\u003e16159 – Guide Plate × 1\u003c\/li\u003e\n\u003cli\u003e16157 – Insert × 1\u003c\/li\u003e\n\u003cli\u003e16155 – Pin × 1\u003c\/li\u003e\n\u003cli\u003e16826 – Gasket × 4\u003c\/li\u003e\n\u003cli\u003e161251 – Screw × 4\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermostat Assembly:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e804540 – Thermostat × 1\u003c\/li\u003e\n\u003cli\u003e27-853702005 – Thermostat Gasket × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel System:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e35-8M0157133 – Fuel Filter × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeals \u0026amp; Gaskets:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e26-16130 – Oil Seal × 1\u003c\/li\u003e\n\u003cli\u003e8035161 – Gasket × 1\u003c\/li\u003e\n\u003cli\u003e25-16131 – O-ring × 1\u003c\/li\u003e\n\u003cli\u003e12-191833 – Drain Gasket × 2\u003c\/li\u003e\n\u003cli\u003e27-95220 – Drain Gasket × 2\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardware \u0026amp; Accessories:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e8150264 – Cotter Pin × 1\u003c\/li\u003e\n\u003cli\u003e875208 – Anode × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color:red;\"\u003e24OP149 – Gear Oil Pump × 1\u003c\/span\u003e (for convenient gear oil changes)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreparation:\u003c\/strong\u003e Disconnect the fuel line and remove the lower unit from the outboard motor following your engine's service manual. Clean the mounting surfaces thoroughly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Pump Disassembly:\u003c\/strong\u003e Remove the old water pump housing and carefully extract the old impeller, noting its orientation. Inspect the pump housing for scoring or damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall New Impeller:\u003c\/strong\u003e Lubricate the new impeller (161543) with glycerin or soapy water and insert it into the housing with blades oriented correctly. Install the guide plate (16159), insert (16157), and pin (16155).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGasket Replacement:\u003c\/strong\u003e Replace all water pump gaskets (16160004, 16158009, 16156, and 16826) ensuring proper alignment. Torque screws (161251) to manufacturer specifications in a cross pattern.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermostat Service:\u003c\/strong\u003e Remove the old thermostat and gasket from the cylinder head. Install the new thermostat (804540) with gasket (27-853702005), ensuring correct orientation with the spring facing the proper direction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel Filter Replacement:\u003c\/strong\u003e Locate the inline fuel filter and replace it with the new filter (35-8M0157133). Ensure fuel flow direction arrows point toward the engine.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLower Unit Seals:\u003c\/strong\u003e Replace the oil seal (26-16130), O-ring (25-16131), and gasket (8035161) on the lower unit drive shaft and propeller shaft as needed. Apply marine-grade grease to seal lips.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrain Plug Gaskets:\u003c\/strong\u003e Install new drain gaskets (12-191833 and 27-95220) on both the upper and lower drain plugs. Do not over-tighten drain plugs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGear Oil Service:\u003c\/strong\u003e Use the included gear oil pump (24OP149) to refill the lower unit with the appropriate gear oil until it flows from the upper vent hole. Install both drain plugs with new gaskets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnode Replacement:\u003c\/strong\u003e Remove the old sacrificial anode and install the new anode (875208). Ensure metal-to-metal contact for proper corrosion protection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReassembly:\u003c\/strong\u003e Reinstall the lower unit to the engine, aligning the water tube and shift linkage carefully. Torque all mounting bolts to specification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinal Check:\u003c\/strong\u003e Reconnect the fuel line, start the engine in a test tank or on muffs, and verify water pump flow and proper operation. Check for leaks around all serviced areas.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm this kit fits my specific Mercury outboard?\u003c\/strong\u003e\u003cbr\u003e\nA: Verify that your engine is a 4-stroke carbureted Mercury rated at 4HP, 5HP, or 6HP with a serial number of 0R411838 or higher. Cross-reference the OEM part number 8M0181315 with your engine's parts diagram to ensure compatibility.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I perform this maintenance service?\u003c\/strong\u003e\u003cbr\u003e\nA: Mercury recommends annual maintenance or every 100 hours of operation, whichever comes first. If you operate in sandy, silty, or saltwater conditions, consider more frequent servicing (every 50 hours).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs that my water pump impeller needs replacement?\u003c\/strong\u003e\u003cbr\u003e\nA: Common symptoms include weak water stream from the tell-tale, engine overheating, steam from the engine, or reduced cooling system performance. If the impeller blades are cracked, worn, or missing pieces, immediate replacement is required.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I reuse the old gaskets if they look okay?\u003c\/strong\u003e\u003cbr\u003e\nA: No, always replace all gaskets and seals during maintenance even if they appear intact. Reusing old gaskets can lead to leaks, overheating, and premature component failure.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Do I need any special tools to complete this maintenance?\u003c\/strong\u003e\u003cbr\u003e\nA: Basic hand tools are required including socket sets, screwdrivers, and a torque wrench. The kit includes a gear oil pump (24OP149) for lower unit service, eliminating the need to purchase one separately.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What's the difference between OEM and aftermarket maintenance kits?\u003c\/strong\u003e\u003cbr\u003e\nA: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How fast do you ship and how much does it cost?\u003c\/strong\u003e\u003cbr\u003e\nA: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is your warranty and return policy?\u003c\/strong\u003e\u003cbr\u003e\nA: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused \u0026amp; in original condition); please see our policy page or reach out for instructions.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eVerify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.\u003c\/li\u003e\n\u003cli\u003eThis product is an aftermarket replacement part and is not an OEM component.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended to ensure safety and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality Assured:\u003c\/strong\u003e As a trusted manufacturer for over 20 years, we supply top marine brands globally.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Global Shipping:\u003c\/strong\u003e Free delivery worldwide in 5–15 days.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect from Manufacturer:\u003c\/strong\u003e Competitive pricing without compromising quality.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":52418259091769,"sku":"23KM771-4N","price":68.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/kit-23KM771-4N_78ebfc47-2fbf-460e-834a-362ab0b58149.png?v=1776686796"},{"product_id":"8m0181316-maintenance-kit-for-mercury-8hp-9-9hp-jlm-marine","title":"8M0181316 Maintenance Kit for Mercury 8HP 9.9HP | JLM Marine","description":"\u003ch2\u003e8M0181316 Maintenance Kit for Mercury 8HP 9.9HP\u003c\/h2\u003e\n\n\u003cp\u003eThis comprehensive maintenance kit is engineered for Mercury 8HP and 9.9HP carbureted outboards with serial numbers 0R042475 and above. It consolidates all essential service components—impeller, thermostat, gaskets, fuel filter, anode, and drain hardware—into one complete package, simplifying routine upkeep and extending engine life.\u003c\/p\u003e\n\n\u003cp\u003eDesigned as a direct replacement for OEM part number \u003cstrong\u003e8M0181316\u003c\/strong\u003e, this kit ensures compatibility and reliable performance across specified Mercury models. Each component meets OEM specifications for fit and function, enabling efficient maintenance intervals without sourcing individual parts.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eIncludes water pump rebuild components (impeller, gaskets, guide plate, insert) for optimal cooling system performance\u003c\/li\u003e\n\u003cli\u003eComplete fuel and cooling system service parts: thermostat, fuel filter, and drain gaskets\u003c\/li\u003e\n\u003cli\u003eSacrificial anode and gear oil pump included for comprehensive engine protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"width:100%; border-collapse:collapse;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e8M0181316\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\n\u003cp\u003eConfirm your engine model\/year in the table below. For Mercury owners, here's a guide to help you identify your engine's serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/mercury-outboard-serial-number-guide\" target=\"_blank\" rel=\"nofollow noopener\"\u003eMercury Serial Number Guide\u003c\/a\u003e. You can also review exploded diagrams to verify part numbers: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/diagrams\/mercury-parts-catalog\" target=\"_blank\" rel=\"nofollow noopener\"\u003eMercury Parts Diagrams \u0026amp; Catalog\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"width:100%; border-collapse:collapse;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e8 \/ 9.9HP carbureted outboards\u003c\/td\u003e\n\u003ctd\u003e8HP \/ 9.9HP\u003c\/td\u003e\n\u003ctd\u003eSerial number 0R042475 \u0026amp; above\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"width:100%; border-collapse:collapse;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOEM Part Number\u003c\/td\u003e\n\u003ctd\u003e8M0181316\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible HP\u003c\/td\u003e\n\u003ctd\u003e8HP \/ 9.9HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngine Type\u003c\/td\u003e\n\u003ctd\u003eCarbureted outboards\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSerial Number Range\u003c\/td\u003e\n\u003ctd\u003e0R042475 \u0026amp; above\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\n\u003cp\u003eThis maintenance kit includes the following components:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e161586\u003c\/strong\u003e (Gasket) × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e161585\u003c\/strong\u003e (Gasket) × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e161587\u003c\/strong\u003e (Gasket) × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8037531\u003c\/strong\u003e (Guide Plate) × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8037511\u003c\/strong\u003e (Insert) × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e9521811\u003c\/strong\u003e (Pin) × 1\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e8037481\u003c\/strong\u003e (Impeller) × 1\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e16826\u003c\/strong\u003e (Gasket) × 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e161268\u003c\/strong\u003e (Screw) × 4\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e8M0119207\u003c\/strong\u003e (Thermostat) × 1\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e27-853702005\u003c\/strong\u003e (Thermostat Gasket) × 1\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e35-8M0157133\u003c\/strong\u003e (Fuel Filter) × 1\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12-895146\u003c\/strong\u003e (Gasket) × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12-191833\u003c\/strong\u003e (Drain Gasket) × 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e27-95220\u003c\/strong\u003e (Drain Gasket) × 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8150264\u003c\/strong\u003e (Cotter Pin) × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e823912\u003c\/strong\u003e (Anode) × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e24OP149\u003c\/strong\u003e (Gear Oil Pump) × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreparation:\u003c\/strong\u003e Disconnect the fuel line and remove the lower unit from the outboard. Drain all gear oil completely before proceeding.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Pump Disassembly:\u003c\/strong\u003e Remove the water pump housing cover and extract the old impeller, guide plate, and insert. Inspect the housing for scoring or corrosion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall New Impeller:\u003c\/strong\u003e Lubricate the new impeller (8037481) with glycerin or soapy water, then install it with blades oriented correctly. Insert the guide plate (8037531) and insert (8037511), securing with pin (9521811).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGasket Replacement:\u003c\/strong\u003e Remove old gaskets (161586, 161585, 161587) from mating surfaces and clean thoroughly. Install new gaskets without adhesive unless specified by the service manual.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReassemble Water Pump:\u003c\/strong\u003e Reinstall the water pump housing using the four screws (161268) and gaskets (16826). Torque screws evenly in a cross pattern to prevent leaks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermostat Service:\u003c\/strong\u003e Access the thermostat housing, remove the old thermostat (8M0119207), and replace it along with the gasket (27-853702005). Ensure proper seating to maintain correct operating temperature.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel Filter Replacement:\u003c\/strong\u003e Locate the inline fuel filter, disconnect fuel lines, and replace with the new filter (35-8M0157133). Ensure proper flow direction as marked on the filter housing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrain Plug Gaskets:\u003c\/strong\u003e Replace drain plug gaskets (12-191833 and 27-95220) on both the lower unit and any oil reservoir access points. Do not overtighten drain plugs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnode Inspection:\u003c\/strong\u003e Remove the old sacrificial anode (823912) and inspect the mounting surface. Install the new anode and secure with the cotter pin (8150264).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGear Oil Refill:\u003c\/strong\u003e Using the included gear oil pump (24OP149), refill the lower unit with manufacturer-recommended gear oil until it flows from the upper vent. Replace gasket (12-895146) and reinstall plugs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinal Assembly:\u003c\/strong\u003e Reattach the lower unit to the outboard, ensuring proper alignment of shift linkage and water tube. Reconnect the fuel line and check for leaks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Check:\u003c\/strong\u003e Start the engine in a test tank or on muffs and verify consistent water stream from the telltale outlet. Monitor for fuel leaks and proper operating temperature.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm this maintenance kit fits my Mercury outboard?\u003c\/strong\u003e\u003cbr\u003e\nA: Verify that your engine is an 8HP or 9.9HP carbureted Mercury outboard with serial number 0R042475 or higher. Cross-check the OEM part number 8M0181316 in your service manual or on Mercury's parts diagram to ensure compatibility.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I perform maintenance with this kit?\u003c\/strong\u003e\u003cbr\u003e\nA: Mercury recommends annual maintenance or every 100 hours of operation, whichever comes first. Replace the impeller and inspect the thermostat yearly; replace the fuel filter and drain gaskets during each service interval to prevent cooling and fuel system failures.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs that I need to replace the impeller or thermostat?\u003c\/strong\u003e\u003cbr\u003e\nA: A weak or absent telltale water stream, engine overheating, or reduced cooling performance indicate impeller failure. If the engine runs too cool or too hot despite a functioning water pump, the thermostat may be stuck open or closed and requires replacement.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I reuse the old gaskets if they appear undamaged?\u003c\/strong\u003e\u003cbr\u003e\nA: No, always replace gaskets during maintenance even if they look intact. Compressed gaskets lose their sealing properties and can cause water or oil leaks, compromising engine performance and leading to costly damage.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is this an OEM kit or an aftermarket replacement?\u003c\/strong\u003e\u003cbr\u003e\nA: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How fast do you ship and how much does it cost?\u003c\/strong\u003e\u003cbr\u003e\nA: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is your warranty and return policy?\u003c\/strong\u003e\u003cbr\u003e\nA: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused \u0026amp; in original condition); please see our policy page or reach out for instructions.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eVerify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.\u003c\/li\u003e\n\u003cli\u003eThis product is an aftermarket replacement part and is not an OEM component.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended to ensure safety and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality Assured:\u003c\/strong\u003e As a trusted manufacturer for over 20 years, we supply top marine brands globally.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Global Shipping:\u003c\/strong\u003e Free delivery worldwide in 5–15 days.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect from Manufacturer:\u003c\/strong\u003e Competitive pricing without compromising quality.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":52418267283769,"sku":"23KM772-4N","price":68.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/kit-23KM772-4N_3ab7931f-955d-4041-a46b-266974344a7b.png?v=1776686799"},{"product_id":"8m0120867-maintenance-kit-for-mercury-8hp-9-9hp-15hp-20hp-command-thrust-jlm-marine","title":"8M0120867 Maintenance Kit for Mercury 8HP 9.9HP 15HP 20HP Command Thrust | JLM Marine","description":"\u003ch2\u003e8M0120867 Maintenance Kit for Mercury 8HP 9.9HP 15HP 20HP Command Thrust | JLM Marine\u003c\/h2\u003e\n\n\u003cp\u003eThis comprehensive maintenance kit is engineered for \u003cstrong\u003eMercury 8HP, 9.9HP, 15HP, and 20HP Command Thrust outboard engines\u003c\/strong\u003e within the serial range \u003cstrong\u003e0R235949-0R833819\u003c\/strong\u003e. It consolidates all essential service components—impeller, thermostats, filters, gaskets, and anodes—into one complete package, streamlining routine maintenance and ensuring optimal engine performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDirect Replacement:\u003c\/strong\u003e OEM part number \u003cstrong\u003e8M0120867\u003c\/strong\u003e. This aftermarket kit matches OEM specifications, delivering reliable performance at a competitive price point.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eComplete Service Solution:\u003c\/strong\u003e Includes impeller, thermostat assembly, fuel \u0026amp; oil filters, gaskets, anode, and gear oil pump—everything needed for a full maintenance cycle.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide HP Range:\u003c\/strong\u003e Fits 8HP through 20HP Command Thrust models within the specified serial range.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOEM-Spec Construction:\u003c\/strong\u003e Manufactured to meet Mercury's dimensional and material standards for drop-in compatibility.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eBrand\u003c\/th\u003e\n      \u003cth\u003ePart Number\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMercury\u003c\/td\u003e\n      \u003ctd\u003e8M0120867\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\n\u003cp\u003eConfirm your engine model\/year in the table below. For Mercury owners, here's a guide to help you identify your engine's serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/mercury-outboard-serial-number-guide\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Serial Number Guide\u003c\/a\u003e. You can also review exploded diagrams to verify part numbers: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/diagrams\/mercury-parts-catalog\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Parts Diagrams \u0026amp; Catalog\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n  \u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eSerial Range\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eCommand Thrust\u003c\/td\u003e\n        \u003ctd\u003e8 \/ 9.9 HP\u003c\/td\u003e\n        \u003ctd\u003e0R235949-0R833819\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eStandard\u003c\/td\u003e\n        \u003ctd\u003e15 HP\u003c\/td\u003e\n        \u003ctd\u003e0R235949-0R833819\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eStandard\u003c\/td\u003e\n        \u003ctd\u003e20 HP\u003c\/td\u003e\n        \u003ctd\u003e0R235949-0R833819\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eSpecification\u003c\/th\u003e\n      \u003cth\u003eValue\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eOEM Part Number\u003c\/td\u003e\n      \u003ctd\u003e8M0120867\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eApplication\u003c\/td\u003e\n      \u003ctd\u003eMercury 8HP \/ 9.9HP \/ 15HP \/ 20HP Command Thrust Outboards\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eSerial Range\u003c\/td\u003e\n      \u003ctd\u003e0R235949-0R833819\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eKit Type\u003c\/td\u003e\n      \u003ctd\u003eComplete Maintenance Kit\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\n\u003cp\u003eThis maintenance kit includes the following components:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8M0075040\u003c\/strong\u003e – Gasket × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e803753\u003c\/strong\u003e – Guide Plate × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e803751\u003c\/strong\u003e – Insert × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e803749\u003c\/strong\u003e – Key × 1\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e803748\u003c\/strong\u003e – Impeller × 1\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e823042046\u003c\/strong\u003e – Screw × 3\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e8M0119207\u003c\/strong\u003e – Thermostat × 1\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e27-853702005\u003c\/strong\u003e – Thermostat Gasket × 1\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e35-8M0157133\u003c\/strong\u003e – Fuel Filter × 1\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e35-822626Q03\u003c\/strong\u003e – Oil Filter × 1\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e12-895146\u003c\/strong\u003e – Gasket × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e12-191833\u003c\/strong\u003e – Drain Gasket × 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e27-95220\u003c\/strong\u003e – Drain Gasket × 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8150264\u003c\/strong\u003e – Cotter Pin × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e823912\u003c\/strong\u003e – Anode × 1\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e24OP149\u003c\/strong\u003e – Gear Oil Pump × 1\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePreparation:\u003c\/strong\u003e Disconnect the fuel line and place the engine in an upright, stable position. Gather necessary tools including screwdrivers, wrenches, and a drain pan.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRemove Lower Unit:\u003c\/strong\u003e Drain the gear oil using the drain screws and collect it in a pan. Unbolt and carefully separate the lower unit from the mid-section.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAccess Water Pump Housing:\u003c\/strong\u003e Remove the water pump housing cover by unscrewing the retaining bolts. Take note of the orientation of components for reassembly.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReplace Impeller:\u003c\/strong\u003e Remove the old impeller, insert, key, and guide plate. Install the new key (803749), insert (803751), impeller (803748), and guide plate (803753) in the correct orientation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInstall Gaskets:\u003c\/strong\u003e Replace all old gaskets with the new ones provided (8M0075040, 12-895146, 12-191833, 27-95220). Ensure mating surfaces are clean and free of debris.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReplace Thermostat:\u003c\/strong\u003e Locate the thermostat housing, remove the old thermostat, and install the new thermostat (8M0119207) along with its gasket (27-853702005).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChange Fuel \u0026amp; Oil Filters:\u003c\/strong\u003e Replace the fuel filter (35-8M0157133) in the fuel line and the oil filter (35-822626Q03) at its mounting location. Hand-tighten securely.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInstall Anode:\u003c\/strong\u003e Replace the sacrificial anode (823912) on the lower unit or engine bracket. This protects metal components from galvanic corrosion.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReassemble Water Pump:\u003c\/strong\u003e Secure the water pump housing with the provided screws (823042046) and tighten in a crisscross pattern to ensure even sealing.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReattach Lower Unit:\u003c\/strong\u003e Using the gear oil pump (24OP149), refill the lower unit with the manufacturer-recommended gear oil until it flows from the upper vent. Reinstall drain gaskets and secure the lower unit to the mid-section.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReconnect \u0026amp; Test:\u003c\/strong\u003e Reconnect the fuel line, check all fasteners for tightness, and inspect for any leaks. Start the engine in a test tank or on-water and confirm proper water flow from the tell-tale.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinal Inspection:\u003c\/strong\u003e Run the engine at idle for several minutes, then increase throttle gradually. Monitor for overheating, unusual vibrations, or leaks and address any issues immediately.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm this kit fits my Mercury outboard?\u003c\/strong\u003e\u003cbr\u003e\nA: Verify your engine's serial number falls within the range \u003cstrong\u003e0R235949-0R833819\u003c\/strong\u003e and that your engine is an 8HP, 9.9HP, 15HP, or 20HP Command Thrust model. Cross-reference with the Compatible Engine Models table above or consult your engine's service manual.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace the components in this maintenance kit?\u003c\/strong\u003e\u003cbr\u003e\nA: Mercury recommends inspecting the impeller annually and replacing it every 2–3 years or 200–300 operating hours, whichever comes first. Thermostats, filters, and anodes should be replaced at similar intervals or whenever signs of wear, corrosion, or clogging are observed.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs that my impeller or thermostat needs replacement?\u003c\/strong\u003e\u003cbr\u003e\nA: Impeller failure typically shows as reduced water flow from the tell-tale, overheating alarms, or visible damage (cracked\/missing vanes). A faulty thermostat may cause the engine to run too cool (poor fuel economy, sluggish performance) or overheat (steam, alarm).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I reuse any of the old gaskets or filters?\u003c\/strong\u003e\u003cbr\u003e\nA: No. Gaskets compress and deform during initial installation, and reusing them can lead to leaks. Filters accumulate contaminants over time and must be replaced to maintain proper fuel and oil flow.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Do I need any special tools to install this maintenance kit?\u003c\/strong\u003e\u003cbr\u003e\nA: Basic hand tools (screwdrivers, socket set, pliers) are sufficient for most steps. The included gear oil pump (24OP149) simplifies lower unit refilling. A service manual for your specific engine model is highly recommended.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is this an OEM or aftermarket part?\u003c\/strong\u003e\u003cbr\u003e\nA: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How fast do you ship and how much does it cost?\u003c\/strong\u003e\u003cbr\u003e\nA: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is your warranty and return policy?\u003c\/strong\u003e\u003cbr\u003e\nA: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused \u0026amp; in original condition); please see our policy page or reach out for instructions.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003eVerify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.\u003c\/li\u003e\n  \u003cli\u003eThis product is an aftermarket replacement part and is not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended to ensure safety and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuality Assured:\u003c\/strong\u003e As a trusted manufacturer for over 20 years, we supply top marine brands globally.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Shipping:\u003c\/strong\u003e Free delivery worldwide in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect from Manufacturer:\u003c\/strong\u003e Competitive pricing without compromising quality.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":52418267316537,"sku":"23KM773-4N","price":68.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/kit-23KM773-4N_fffc370d-57ef-443b-8e26-770e764dd409.png?v=1776686801"},{"product_id":"8m0251124-maintenance-kit-for-mercury-25hp-30hp-jlm-marine","title":"8M0251124 Maintenance Kit for Mercury 25HP 30HP | JLM Marine","description":"\u003ch2\u003e8M0251124 Maintenance Kit for Mercury 25HP 30HP | JLM Marine\u003c\/h2\u003e\n\n\u003cp\u003eThis comprehensive maintenance kit is engineered for Mercury 25HP and 30HP Japanese model outboards, delivering all essential components for a complete service interval in one package. Designed to restore and maintain peak engine performance, this kit simplifies routine maintenance and ensures reliable operation on the water.\u003c\/p\u003e\n\n\u003cp\u003eThis kit directly replaces OEM part number \u003cstrong\u003e8M0251124\u003c\/strong\u003e, providing an aftermarket solution that meets factory specifications. It includes the water pump rebuild components, thermostat assembly, fuel filter, drain gaskets, and gear oil pump—everything needed for a thorough maintenance service.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eComplete service kit with \u003cstrong\u003e14 components\u003c\/strong\u003e including water pump parts, thermostat, fuel filter, and gear oil pump\u003c\/li\u003e\n\u003cli\u003eFits Mercury \u003cstrong\u003e25HP and 30HP Japanese models\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eDirect replacement for OEM part number \u003cstrong\u003e8M0251124\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e8M0251124\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\n\u003cp\u003eConfirm your engine model\/year in the table below. For Mercury owners, here's a guide to help you identify your engine's serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/mercury-outboard-serial-number-guide\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Serial Number Guide\u003c\/a\u003e. You can also review exploded diagrams to verify part numbers: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/diagrams\/mercury-parts-catalog\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Parts Diagrams \u0026amp; Catalog\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003eJapanese Models\u003c\/td\u003e\n\u003ctd\u003e25HP \/ 30HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOEM Part Number\u003c\/td\u003e\n\u003ctd\u003e8M0251124\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eMercury 25HP \/ 30HP Japanese Models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKit Type\u003c\/td\u003e\n\u003ctd\u003eMaintenance Kit (Water Pump, Thermostat, Fuel Filter, Gear Oil Pump)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\n\u003cp\u003eThis maintenance kit includes the following components:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e161572\u003c\/strong\u003e - Insert Cup × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e47-16154-1\u003c\/strong\u003e - \u003cspan style=\"color:red;\"\u003eImpeller × 1\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e27-161602\u003c\/strong\u003e - Gasket × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e161592\u003c\/strong\u003e - Plate × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e27-161582\u003c\/strong\u003e - Gasket × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e28-161551\u003c\/strong\u003e - Key × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e910103-5652\u003c\/strong\u003e - Screw × 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8M0119207\u003c\/strong\u003e - \u003cspan style=\"color:red;\"\u003eThermostat × 1\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e27-853702005\u003c\/strong\u003e - Thermostat Gasket × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e35-8M0088825\u003c\/strong\u003e - \u003cspan style=\"color:red;\"\u003eFuel Filter × 1\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8M02046936\u003c\/strong\u003e - Drain Gasket × 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8150264\u003c\/strong\u003e - Cotter Pin × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e27-828816\u003c\/strong\u003e - Oil Drain Screw Gasket × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e24OP149\u003c\/strong\u003e - \u003cspan style=\"color:red;\"\u003eGear Oil Pump × 1\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n\u003cli\u003eDisconnect the battery and ensure the engine is cool before beginning work. Gather all tools and components from the kit.\u003c\/li\u003e\n\u003cli\u003eRemove the lower unit from the outboard following your engine's service manual. Drain the gear oil completely and inspect for metal particles or contamination.\u003c\/li\u003e\n\u003cli\u003eRemove the water pump housing cover and extract the old impeller, plate, and insert cup. Clean all surfaces thoroughly, removing old gasket material and debris.\u003c\/li\u003e\n\u003cli\u003eInstall the new insert cup (161572) into the pump housing, ensuring it seats properly. Place the new impeller (47-16154-1) with blades oriented in the correct rotation direction.\u003c\/li\u003e\n\u003cli\u003eInsert the key (28-161551) into the driveshaft slot, then position the new plate (161592) over the impeller. Apply a thin layer of marine grease to the impeller blades for easier installation.\u003c\/li\u003e\n\u003cli\u003eInstall the new gaskets (27-161602 and 27-161582) on their respective surfaces. Reattach the pump housing cover using the four new screws (910103-5652), tightening in a cross pattern.\u003c\/li\u003e\n\u003cli\u003eRemove the old thermostat from the powerhead and clean the seating area. Install the new thermostat (8M0119207) with the new gasket (27-853702005), ensuring correct orientation.\u003c\/li\u003e\n\u003cli\u003eReplace the fuel filter (35-8M0088825) on the fuel line, ensuring proper flow direction as marked on the filter body. Tighten connections securely to prevent leaks.\u003c\/li\u003e\n\u003cli\u003eInstall the new drain gaskets (8M02046936) on the lower unit drain and vent plugs. Replace the oil drain screw gasket (27-828816) as needed.\u003c\/li\u003e\n\u003cli\u003eReattach the lower unit to the outboard, aligning the driveshaft and water tube carefully. Secure all mounting bolts to factory torque specifications.\u003c\/li\u003e\n\u003cli\u003eUsing the included gear oil pump (24OP149), refill the lower unit with the manufacturer-recommended gear oil until it flows from the vent hole. Install the vent plug first, then the drain plug with the cotter pin (8150264).\u003c\/li\u003e\n\u003cli\u003eReconnect the battery and perform a water test with the engine in a test tank or on muffs. Check for proper water flow from the telltale and inspect all connections for leaks.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm this kit fits my Mercury engine?\u003c\/strong\u003e\u003cbr\u003e\nA: This kit is designed specifically for Mercury 25HP and 30HP Japanese models. Verify your engine's model designation and check that your current part number is 8M0251124. If you're unsure, consult your engine's service manual or use the Mercury serial number guide linked above to identify your exact model.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace these maintenance components?\u003c\/strong\u003e\u003cbr\u003e\nA: Mercury recommends servicing the water pump impeller annually or every 100 hours of operation, whichever comes first. The thermostat and fuel filter should be inspected during this service and replaced if showing wear. Gear oil should be changed at least once per season or every 100 hours.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs that my water pump impeller needs replacement?\u003c\/strong\u003e\u003cbr\u003e\nA: Common symptoms include reduced water flow from the telltale, engine overheating, steam from the powerhead, or weak stream during operation. If you notice any of these signs, inspect and replace the impeller immediately to prevent engine damage.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I install this kit myself or do I need a professional?\u003c\/strong\u003e\u003cbr\u003e\nA: If you have mechanical experience and the proper tools, you can install this kit following your engine's service manual. The water pump and thermostat replacement require removing the lower unit, which demands careful alignment during reassembly. Professional installation is recommended if you're unfamiliar with outboard servicing.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: OEM vs. Aftermarket?\u003c\/strong\u003e\u003cbr\u003e\nA: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How fast do you ship and how much does it cost?\u003c\/strong\u003e\u003cbr\u003e\nA: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is your warranty and return policy?\u003c\/strong\u003e\u003cbr\u003e\nA: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused \u0026amp; in original condition); please see our policy page or reach out for instructions.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eVerify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.\u003c\/li\u003e\n\u003cli\u003eThis product is an aftermarket replacement part and is not an OEM component.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended to ensure safety and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality Assured:\u003c\/strong\u003e As a trusted manufacturer for over 20 years, we supply top marine brands globally.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Global Shipping:\u003c\/strong\u003e Free delivery worldwide in 5–15 days.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect from Manufacturer:\u003c\/strong\u003e Competitive pricing without compromising quality.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":52418275606841,"sku":"23KM775-2N","price":68.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/kit-23KM775-2N_757b278b-0e25-4ecc-9154-53f0caf59f75.png?v=1776686807"},{"product_id":"8m0251122-service-kit-for-mercury-15hp-18hp-jlm-marine","title":"8M0251122 Service Kit for Mercury 15HP 18HP | JLM Marine","description":"\u003ch2\u003e8M0251122 Service Kit for Mercury 15HP 18HP | JLM Marine\u003c\/h2\u003e\n\n\u003cp\u003eThis comprehensive service kit is engineered for \u003cstrong\u003eMercury 15HP and 18HP outboard engines\u003c\/strong\u003e, specifically the 18HP 2-cylinder International models (serial number 0N001590 \u0026amp; Up) and 15HP Japanese models. It includes all essential components for routine maintenance—impeller, thermostat, gaskets, fuel filter, anode, and fasteners—to keep your engine running at peak performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDirect Replacement for OEM Part Number:\u003c\/strong\u003e 8M0251122. This aftermarket kit delivers OEM-equivalent fit and function at a competitive price, ensuring reliable service intervals for your Mercury outboard.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eComplete 13-piece service kit with impeller, thermostat, fuel filter, and all necessary gaskets\u003c\/li\u003e\n  \u003cli\u003eIncludes gear oil pump and anode for comprehensive maintenance coverage\u003c\/li\u003e\n  \u003cli\u003eDesigned for Mercury 2-cylinder outboards with serial number 0N001590 and up\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse:collapse; width:100%;\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eBrand\u003c\/th\u003e\n      \u003cth\u003ePart Number\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMercury\u003c\/td\u003e\n      \u003ctd\u003e8M0251122\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\n\u003cp\u003eConfirm your engine model\/year in the table below. For Mercury owners, here's a guide to help you identify your engine's serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/mercury-outboard-serial-number-guide\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Serial Number Guide\u003c\/a\u003e. You can also review exploded diagrams to verify part numbers: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/diagrams\/mercury-parts-catalog\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Parts Diagrams \u0026amp; Catalog\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n  \u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse:collapse; width:100%;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e2cyl International\u003c\/td\u003e\n        \u003ctd\u003e18HP\u003c\/td\u003e\n        \u003ctd\u003eSerial Number 0N001590 \u0026amp; Up\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eJapanese Models\u003c\/td\u003e\n        \u003ctd\u003e15HP\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse:collapse; width:100%;\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eSpecification\u003c\/th\u003e\n      \u003cth\u003eValue\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eOEM Part Number\u003c\/td\u003e\n      \u003ctd\u003e8M0251122\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eApplication\u003c\/td\u003e\n      \u003ctd\u003eMercury 15HP \u0026amp; 18HP Outboards\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eKit Type\u003c\/td\u003e\n      \u003ctd\u003eComplete Service Kit\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eNumber of Components\u003c\/td\u003e\n      \u003ctd\u003e13 pieces (multiple quantities included)\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\n\u003cp\u003eThis service kit includes the following components:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8M0075040\u003c\/strong\u003e – Gasket × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e803753\u003c\/strong\u003e – Guide Plate × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e803751\u003c\/strong\u003e – Insert × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e803749\u003c\/strong\u003e – Key × 1\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e803748\u003c\/strong\u003e – Impeller × 1 (critical wear component)\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e823042046\u003c\/strong\u003e – Screw × 3\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e804540\u003c\/strong\u003e – Thermostat × 1\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e27-853702005\u003c\/strong\u003e – Thermostat Gasket × 1\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e35-8M0088825\u003c\/strong\u003e – Fuel Filter × 1\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e12-191833\u003c\/strong\u003e – Drain Screw Gasket × 3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e27-828816\u003c\/strong\u003e – Oil Drain Screw Gasket × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e803731\u003c\/strong\u003e – Anode × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e24OP149\u003c\/strong\u003e – Gear Oil Pump × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003cp\u003eFollow these steps to install the service kit components. Always refer to your Mercury service manual for model-specific procedures:\u003c\/p\u003e\n\n\u003col\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePreparation:\u003c\/strong\u003e Disconnect the fuel line and remove the lower unit from the engine according to your service manual. Drain all gear oil into a suitable container.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRemove Old Impeller:\u003c\/strong\u003e Access the water pump housing and carefully extract the old impeller (803748), guide plate (803753), and insert (803751). Inspect the housing for wear or damage.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClean Surfaces:\u003c\/strong\u003e Thoroughly clean all gasket surfaces on the pump housing and lower unit. Remove old gasket material to ensure proper sealing.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInstall New Impeller Assembly:\u003c\/strong\u003e Lubricate the new impeller with glycerin or soapy water, then install it with the key (803749), insert, and guide plate in the correct orientation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReplace Thermostat:\u003c\/strong\u003e Remove the old thermostat (804540) from its housing and clean the mating surface. Install the new thermostat with a fresh gasket (27-853702005).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInstall Gaskets:\u003c\/strong\u003e Position the new water pump gasket (8M0075040) on the lower unit housing. Ensure proper alignment before reassembly.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReassemble Lower Unit:\u003c\/strong\u003e Carefully reinstall the lower unit onto the engine, torquing all screws (823042046) to factory specifications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReplace Drain Screw Gaskets:\u003c\/strong\u003e Install new drain screw gaskets (12-191833) and oil drain screw gasket (27-828816) on all drain plugs before refilling.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRefill Gear Oil:\u003c\/strong\u003e Use the included gear oil pump (24OP149) to refill the lower unit with Mercury Premium Gear Lube or equivalent. Fill until oil appears at the upper vent hole.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReplace Fuel Filter:\u003c\/strong\u003e Locate the inline fuel filter and replace it with the new filter (35-8M0088825). Ensure all connections are secure and free of leaks.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInstall Anode:\u003c\/strong\u003e Replace the old anode (803731) with the new one, ensuring proper electrical contact for corrosion protection.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTest Run:\u003c\/strong\u003e Reconnect the fuel line, prime the system, and run the engine in a test tank or on-water. Check for proper water flow from the tell-tale and inspect for any leaks.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm this kit fits my Mercury engine?\u003c\/strong\u003e\u003cbr\u003e\nA: Check your engine's serial number plate—this kit fits 18HP 2-cylinder International models with serial number 0N001590 and up, as well as 15HP Japanese models. Cross-reference your serial number with the compatibility table above or consult your Mercury dealer.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace the impeller and service components?\u003c\/strong\u003e\u003cbr\u003e\nA: Mercury recommends replacing the water pump impeller every 2–3 years or 200–300 hours of operation, whichever comes first. The thermostat, fuel filter, and gaskets should be replaced at the same interval or if you notice overheating, poor water flow, or fuel delivery issues.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs that my impeller or thermostat has failed?\u003c\/strong\u003e\u003cbr\u003e\nA: Common symptoms include weak or no water flow from the tell-tale, engine overheating alarms, steam from the engine, or reduced cooling performance. If you notice any of these, inspect and replace the impeller and thermostat immediately to prevent engine damage.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I reuse the old gaskets and screws?\u003c\/strong\u003e\u003cbr\u003e\nA: No, always replace gaskets with new ones to ensure proper sealing and prevent leaks. The kit includes all necessary gaskets and screws—reusing old components can lead to water intrusion, oil leaks, and premature part failure.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What type of gear oil should I use with the included pump?\u003c\/strong\u003e\u003cbr\u003e\nA: Use Mercury Premium Gear Lube or a high-quality marine gear oil rated for outboard lower units. The included pump (24OP149) makes refilling easy and minimizes mess.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is this an OEM or aftermarket part?\u003c\/strong\u003e\u003cbr\u003e\nA: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How fast do you ship and how much does it cost?\u003c\/strong\u003e\u003cbr\u003e\nA: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is your warranty and return policy?\u003c\/strong\u003e\u003cbr\u003e\nA: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused \u0026amp; in original condition); please see our policy page or reach out for instructions.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003eVerify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.\u003c\/li\u003e\n  \u003cli\u003eThis product is an aftermarket replacement part and is not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended to ensure safety and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuality Assured:\u003c\/strong\u003e As a trusted manufacturer for over 20 years, we supply top marine brands globally.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Shipping:\u003c\/strong\u003e Free delivery worldwide in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect from Manufacturer:\u003c\/strong\u003e Competitive pricing without compromising quality.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":52418325479737,"sku":"25KM264-2N","price":68.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/kit-25KM264-2N_e09c2dfe-14ab-45b2-8d92-06840cdc018a.png?v=1776686856"},{"product_id":"3nv-87500-0-service-kit-for-tohatsu-mfs25c-mfs30c-mfs25d-mfs30d-jlm-marine","title":"3NV-87500-0 Service Kit for Tohatsu MFS25C MFS30C MFS25D MFS30D | JLM Marine","description":"\u003ch2\u003eService Kit for Tohatsu MFS25C, MFS30C, MFS25D, MFS30D Outboard Engines\u003c\/h2\u003e\n\n\u003cp\u003eThis comprehensive service kit is engineered for \u003cstrong\u003eTohatsu MFS25C, MFS30C, MFS25D, and MFS30D\u003c\/strong\u003e outboard engines, delivering all the essential components needed for a complete routine maintenance overhaul. Whether you're performing seasonal servicing or addressing wear on critical cooling and filtration systems, this kit ensures your engine runs at peak performance.\u003c\/p\u003e\n\n\u003cp\u003eThis kit directly replaces OEM part number \u003cstrong\u003e3NV-87500-0\u003c\/strong\u003e, providing an aftermarket solution that meets OEM specifications. It includes water pump components, thermostats, filters, gaskets, and hardware—everything required for a thorough service in one convenient package.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eIncludes complete water pump rebuild components (impeller, gaskets, insert cup, plate, key, and hardware)\u003c\/li\u003e\n  \u003cli\u003eFeatures dual thermostat assemblies with gaskets for comprehensive cooling system maintenance\u003c\/li\u003e\n  \u003cli\u003eContains fuel filter, oil filter, drain gaskets, and gear oil pump for full fluid system service\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse:collapse; width:100%;\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eBrand\u003c\/th\u003e\n      \u003cth\u003ePart Number\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eTohatsu\u003c\/td\u003e\n      \u003ctd\u003e3NV-87500-0\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n  \u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse:collapse; width:100%;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eMFS25\/30C\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eMFS25\/30D\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse:collapse; width:100%;\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eSpecification\u003c\/th\u003e\n      \u003cth\u003eValue\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eOEM Number\u003c\/td\u003e\n      \u003ctd\u003e3NV-87500-0\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCompatible Models\u003c\/td\u003e\n      \u003ctd\u003eTohatsu MFS25C, MFS30C, MFS25D, MFS30D\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eKit Type\u003c\/td\u003e\n      \u003ctd\u003eComplete Service\/Maintenance Kit\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\n\u003cp\u003eThis service kit includes the following components:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e161572\u003c\/strong\u003e (Insert Cup) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e47-16154-1\u003c\/strong\u003e (Impeller) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e27-161602\u003c\/strong\u003e (Gasket) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e161592\u003c\/strong\u003e (Plate) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e27-161582\u003c\/strong\u003e (Gasket) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e28-161551\u003c\/strong\u003e (Key) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e910103-5652\u003c\/strong\u003e (Screw) × 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8M0119207\u003c\/strong\u003e (Thermostat) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e27-853702005\u003c\/strong\u003e (Thermostat Gasket) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e35-8M0088825\u003c\/strong\u003e (Fuel Filter) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e35-8M0162831\u003c\/strong\u003e (Oil Filter) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8M007119\u003c\/strong\u003e (Drain Gasket) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8M02046936\u003c\/strong\u003e (Drain Gasket) × 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e12-895146\u003c\/strong\u003e (Gasket) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8150264\u003c\/strong\u003e (Cotter Pin) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e24OP149\u003c\/strong\u003e (Gear Oil Pump) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e3R3-01030-0\u003c\/strong\u003e (Thermostat) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e346-01032-0\u003c\/strong\u003e (Thermostat Gasket) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e3AD-02230-0\u003c\/strong\u003e (Fuel Filter) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e3BJ-07615-0\u003c\/strong\u003e (Oil Filter) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2049\u003c\/strong\u003e (Drain Gasket) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2492\u003c\/strong\u003e (Drain Gasket) × 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e3R3-07406-0\u003c\/strong\u003e (Gasket) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e951503-0322\u003c\/strong\u003e (Cotter Pin) × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e This kit contains duplicate components with different part numbers to ensure compatibility across MFS25\/30C and MFS25\/30D engine variants. Verify which components apply to your specific model before installation.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePreparation:\u003c\/strong\u003e Gather all necessary tools including screwdrivers, wrenches, and a service manual for your specific Tohatsu model. Ensure the engine is off and cool before beginning work.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWater Pump Disassembly:\u003c\/strong\u003e Remove the lower unit and locate the water pump housing. Carefully remove the screws securing the housing cover using the appropriate size driver.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRemove Old Components:\u003c\/strong\u003e Extract the old impeller, gaskets, insert cup, and plate. Inspect the housing for debris, corrosion, or scoring that may affect seal integrity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInstall Insert Cup and Plate:\u003c\/strong\u003e Place the new insert cup (161572) and plate (161592) into the housing, ensuring proper orientation per your service manual.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInstall Impeller:\u003c\/strong\u003e Lubricate the new impeller (47-16154-1) with water pump grease and carefully insert it, bending the vanes in the direction of rotation. Install the key (28-161551) in its slot.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInstall Gaskets and Reassemble:\u003c\/strong\u003e Position the new gaskets (27-161602, 27-161582) and secure the water pump housing with the provided screws (910103-5652). Torque to specification.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReplace Thermostats:\u003c\/strong\u003e Locate the thermostat housings and remove the old thermostats. Install the new thermostats (8M0119207, 3R3-01030-0) with fresh gaskets (27-853702005, 346-01032-0).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReplace Fuel Filter:\u003c\/strong\u003e Disconnect the fuel line and remove the old fuel filter. Install the new fuel filter (35-8M0088825 or 3AD-02230-0) ensuring proper flow direction.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReplace Oil Filter:\u003c\/strong\u003e Drain the engine oil and remove the old oil filter. Install the new oil filter (35-8M0162831 or 3BJ-07615-0) with a light coating of fresh oil on the gasket.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReplace Drain Gaskets:\u003c\/strong\u003e When draining gear oil, replace all drain plug gaskets (8M007119, 8M02046936, 2049, 2492) to prevent leaks.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRefill Fluids:\u003c\/strong\u003e Use the included gear oil pump (24OP149) to refill the lower unit with the manufacturer-recommended gear oil. Refill engine oil to the proper level and reconnect fuel lines.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinal Inspection:\u003c\/strong\u003e Reinstall the lower unit, install the cotter pins (8150264, 951503-0322) where required, and perform a thorough visual inspection. Start the engine and check for proper water flow, leaks, and normal operating temperature.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm this service kit fits my Tohatsu engine?\u003c\/strong\u003e\u003cbr\u003e\nA: Verify that your engine model is MFS25C, MFS30C, MFS25D, or MFS30D. Cross-reference the OEM part number 3NV-87500-0 with your engine's service manual or parts diagram to ensure compatibility.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I perform this service and replace these components?\u003c\/strong\u003e\u003cbr\u003e\nA: Tohatsu recommends servicing the water pump impeller annually or every 100 operating hours, whichever comes first. Filters and thermostats should be inspected annually and replaced as needed, typically every 1–2 years depending on usage conditions.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs that my water pump or thermostat needs replacement?\u003c\/strong\u003e\u003cbr\u003e\nA: Common symptoms include engine overheating, weak or no water discharge from the telltale, steam from the engine, or inconsistent operating temperatures. If you observe any of these signs, inspect and replace the water pump and thermostat immediately.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Why does this kit include duplicate components with different part numbers?\u003c\/strong\u003e\u003cbr\u003e\nA: The MFS25\/30C and MFS25\/30D models use slightly different components for certain items like thermostats, filters, and gaskets. This kit includes both variants to ensure complete coverage; use the components that match your specific engine model as shown in your service manual.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I install this service kit myself or do I need a professional?\u003c\/strong\u003e\u003cbr\u003e\nA: If you have mechanical experience and the proper tools, you can perform this service following the installation guide and your engine's service manual. However, professional installation is recommended if you are unfamiliar with outboard maintenance to ensure safety and proper function.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is this an OEM or aftermarket service kit?\u003c\/strong\u003e\u003cbr\u003e\nA: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How fast do you ship and how much does it cost?\u003c\/strong\u003e\u003cbr\u003e\nA: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is your warranty and return policy?\u003c\/strong\u003e\u003cbr\u003e\nA: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused \u0026amp; in original condition); please see our policy page or reach out for instructions.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003eVerify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.\u003c\/li\u003e\n  \u003cli\u003eThis product is an aftermarket replacement part and is not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended to ensure safety and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuality Assured:\u003c\/strong\u003e As a trusted manufacturer for over 20 years, we supply top marine brands globally.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Shipping:\u003c\/strong\u003e Free delivery worldwide in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect from Manufacturer:\u003c\/strong\u003e Competitive pricing without compromising quality.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":52418416705849,"sku":"23KM775-4N","price":68.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/kit-23KM775-4N_9edc8119-8cef-4244-8ed7-22376c8e1f49.png?v=1776686930"}],"url":"https:\/\/jlmmarine.com\/collections\/mercury-30-2-cyl-2-stroke-international-sn-0-055505.oembed","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}