{"product_id":"26-41365a3-lower-unit-seal-kit-for-mercury-mariner-jlm-marine","title":"26-41365A3 Lower Unit Seal Kit for Mercury Mariner | JLM Marine","description":"\u003ch2\u003eLower Unit Seal Kit for Mercury Mariner 6, 8, 9.9, 10, 15 HP Outboard Motors\u003c\/h2\u003e\n\n\u003cp\u003eThis comprehensive lower unit seal kit is engineered for Mercury Mariner 2-stroke and 4-stroke outboard motors ranging from \u003cstrong\u003e6 HP to 15 HP\u003c\/strong\u003e. Designed to restore lower unit integrity and prevent water intrusion, this kit fits models from \u003cstrong\u003e1986 and up\u003c\/strong\u003e, including select Force and Sears engines. It provides a complete rebuild solution for maintaining your outboard's water pump and lower unit sealing system.\u003c\/p\u003e\n\n\u003cp\u003eThis aftermarket replacement kit directly replaces OEM part numbers \u003cstrong\u003e26-41365A3\u003c\/strong\u003e, \u003cstrong\u003e46-42089A3\u003c\/strong\u003e, \u003cstrong\u003e46-42089A4\u003c\/strong\u003e, \u003cstrong\u003e46-42089A5\u003c\/strong\u003e, \u003cstrong\u003e46-42040A5\u003c\/strong\u003e, \u003cstrong\u003e46-42040T5\u003c\/strong\u003e, and \u003cstrong\u003e46-42040A1\u003c\/strong\u003e, as well as Sierra Marine \u003cstrong\u003e18-3149\u003c\/strong\u003e and \u003cstrong\u003e18-3149-2\u003c\/strong\u003e. It consolidates multiple OEM and aftermarket part numbers for broad compatibility across Mercury Mariner outboard models.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eComplete water pump and seal rebuild kit with all necessary gaskets, seals, and hardware\u003c\/li\u003e\n\u003cli\u003eFits both 2-stroke and 4-stroke Mercury Mariner models from 6 HP to 15 HP\u003c\/li\u003e\n\u003cli\u003eIncludes premium impeller, housing assembly, face plate, base assembly, and dual oil seals\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Marine\u003c\/td\u003e\n\u003ctd\u003e26-41365A3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Marine\u003c\/td\u003e\n\u003ctd\u003e46-42089A3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Marine\u003c\/td\u003e\n\u003ctd\u003e46-42089A4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Marine\u003c\/td\u003e\n\u003ctd\u003e46-42089A5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Marine\u003c\/td\u003e\n\u003ctd\u003e46-42040A5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Marine\u003c\/td\u003e\n\u003ctd\u003e46-42040T5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Marine\u003c\/td\u003e\n\u003ctd\u003e46-42040A1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSierra Marine\u003c\/td\u003e\n\u003ctd\u003e18-3149\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSierra Marine\u003c\/td\u003e\n\u003ctd\u003e18-3149-2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSierra Marine\u003c\/td\u003e\n\u003ctd\u003e18-2697-1\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\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 Mariner\u003c\/td\u003e\n\u003ctd\u003e6 HP\u003c\/td\u003e\n\u003ctd\u003e6 HP\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1986 - Up\u003c\/td\u003e\n\u003ctd\u003eSerial Number 0A197112 and Up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Mariner\u003c\/td\u003e\n\u003ctd\u003e8 HP\u003c\/td\u003e\n\u003ctd\u003e8 HP\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1986 - Up\u003c\/td\u003e\n\u003ctd\u003eSerial Number 0A197112 and Up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Mariner\u003c\/td\u003e\n\u003ctd\u003e9.9 HP\u003c\/td\u003e\n\u003ctd\u003e9.9 HP\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1986 - Up\u003c\/td\u003e\n\u003ctd\u003eSerial Number 0A197112 and Up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Mariner\u003c\/td\u003e\n\u003ctd\u003e15 HP\u003c\/td\u003e\n\u003ctd\u003e15 HP\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1988 - Up\u003c\/td\u003e\n\u003ctd\u003eSerial Number 0B292414 and Up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Mariner\u003c\/td\u003e\n\u003ctd\u003e8 HP 4-Stroke (232CC)\u003c\/td\u003e\n\u003ctd\u003e8 HP\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1995 - 2004\u003c\/td\u003e\n\u003ctd\u003eS\/N 0G760300 - 0T178499\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Mariner\u003c\/td\u003e\n\u003ctd\u003e9.9 HP 4-Stroke (Non-Bigfoot)\u003c\/td\u003e\n\u003ctd\u003e9.9 HP\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1999 - 2004\u003c\/td\u003e\n\u003ctd\u003eS\/N 0G760300 - 0T979999\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Mariner\u003c\/td\u003e\n\u003ctd\u003e15 HP 4-Stroke (323cc Non-Bigfoot)\u003c\/td\u003e\n\u003ctd\u003e15 HP\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998 - 2004\u003c\/td\u003e\n\u003ctd\u003eS\/N 0G590000 - 1B727495\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eForce\u003c\/td\u003e\n\u003ctd\u003e9.9 HP\u003c\/td\u003e\n\u003ctd\u003e9.9 HP\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eForce\u003c\/td\u003e\n\u003ctd\u003e15 HP\u003c\/td\u003e\n\u003ctd\u003e15 HP\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSears\u003c\/td\u003e\n\u003ctd\u003e9.9 HP\u003c\/td\u003e\n\u003ctd\u003e9.9 HP\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSears\u003c\/td\u003e\n\u003ctd\u003e15 HP\u003c\/td\u003e\n\u003ctd\u003e15 HP\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\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\u003e26-41365A3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eLower Unit Seal Kit \/ Water Pump Rebuild Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eMercury Mariner 6, 8, 9.9, 10, 15 HP Outboard Motors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003e2-Stroke \u0026amp; 4-Stroke Models\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 complete rebuild kit includes all components shown in the product images:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"color:red;\"\u003e1× Water Pump Impeller\u003c\/span\u003e (47-42038Q02, 420382, 47-42038-2)\u003c\/li\u003e\n\u003cli\u003e1× Impeller Key\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color:red;\"\u003e1× Housing Assembly\u003c\/span\u003e (42089A2)\u003c\/li\u003e\n\u003cli\u003e1× Face Plate (42200)\u003c\/li\u003e\n\u003cli\u003e1× Gasket (19202, 192043)\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color:red;\"\u003e1× Water Pump Base Assembly\u003c\/span\u003e (42040T5)\u003c\/li\u003e\n\u003cli\u003e2× Oil Seal (413651)\u003c\/li\u003e\n\u003cli\u003e2× Washers\u003c\/li\u003e\n\u003cli\u003e1× Quad Ring (822236)\u003c\/li\u003e\n\u003cli\u003e1× Screw\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e The package contains all parts shown in the product images.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrepare your workspace:\u003c\/strong\u003e Disconnect the fuel line and shift the engine into neutral. Remove the propeller and drain the lower unit gear oil completely.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove the lower unit:\u003c\/strong\u003e Disconnect the shift linkage and unbolt the lower unit from the midsection. Carefully separate the lower unit assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisassemble the water pump:\u003c\/strong\u003e Remove the old water pump housing, face plate, and impeller. Clean all mating surfaces thoroughly to remove old gasket material and debris.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInspect components:\u003c\/strong\u003e Check the drive shaft and water tube for wear or damage. Replace any corroded or damaged parts before reassembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall new oil seals:\u003c\/strong\u003e Carefully press the new oil seals (413651) into the lower unit housing. Lubricate seals with marine-grade grease before installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall the water pump base:\u003c\/strong\u003e Position the new water pump base assembly (42040T5) with the provided gasket. Ensure proper alignment with the drive shaft.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall the impeller:\u003c\/strong\u003e Lubricate the new impeller with glycerin or soapy water. Insert the impeller key and slide the impeller onto the drive shaft, rotating blades in the correct direction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall housing and face plate:\u003c\/strong\u003e Place the new housing assembly (42089A2) over the impeller, ensuring blades are properly seated. Install the face plate (42200) with a new gasket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReassemble the lower unit:\u003c\/strong\u003e Install washers and quad ring (822236) as shown in your service manual. Reconnect the shift linkage and align the water tube with the pump intake.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt the lower unit:\u003c\/strong\u003e Reinstall all mounting bolts in the correct sequence and torque to manufacturer specifications. Do not overtighten.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefill gear oil:\u003c\/strong\u003e Fill the lower unit with fresh marine gear oil until it flows from the upper vent hole. Install drain and vent plugs with new washers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest operation:\u003c\/strong\u003e Reinstall the propeller and run the engine in a test tank or on the water. Verify strong water pump flow from the telltale and check for leaks.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm this kit fits my Mercury Mariner engine?\u003c\/strong\u003e\u003cbr\u003e\nA: Check the compatible engine models table above and match your engine's HP rating, stroke type (2-stroke or 4-stroke), year, and serial number. Serial numbers are typically stamped on the engine mounting bracket or swivel bracket.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace the water pump and seals?\u003c\/strong\u003e\u003cbr\u003e\nA: Mercury recommends replacing the water pump impeller and seals every 2-3 years or 200-300 hours of operation, whichever comes first. Replace immediately if you notice overheating or reduced water flow from the telltale indicator.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs that my lower unit seals are failing?\u003c\/strong\u003e\u003cbr\u003e\nA: Common symptoms include milky or contaminated gear oil (indicating water intrusion), visible oil leaks around the propeller shaft, difficulty shifting gears, or unusual noise from the lower unit during operation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I use this kit on Bigfoot models?\u003c\/strong\u003e\u003cbr\u003e\nA: No, this kit is designed for standard (Non-Bigfoot) Mercury Mariner models only. Bigfoot models require different part numbers due to their larger gearcase design.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Do I need any special tools to install this seal kit?\u003c\/strong\u003e\u003cbr\u003e\nA: Basic hand tools are sufficient for most installations, but a seal driver set, torque wrench, and gear oil pump are recommended. Refer to your Mercury service manual for specific torque specifications and procedures.\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":51981001294137,"sku":"23KM444","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/12_b8a25615-3d68-4e62-b34e-75db083c1217.jpg?v=1772414228","url":"https:\/\/jlmmarine.com\/ru\/products\/26-41365a3-lower-unit-seal-kit-for-mercury-mariner-jlm-marine","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}