{"title":"Mercury 25 (2 CYL.)(2-STROKE)(International) (0N055505 \u0026 Up) Parts \u0026 Diagrams","description":"\u003cp\u003eOEM and aftermarket replacement parts for Mercury 25 (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":15.5,"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":9.97,"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":8.41,"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"}],"url":"https:\/\/jlmmarine.com\/collections\/mercury-25-2-cyl-2-stroke-international-sn-0-055505.oembed","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}