{"product_id":"8m0251129-annual-service-kit-for-mercury-70hp-75hp-80hp-90hp-115hp-125hp-60hp-jlm-marine","title":"8M0251129 Annual Service Kit for Mercury 70HP 75HP 80HP 90HP 115HP 125HP 60HP | JLM Marine","description":"\u003ch2\u003eAnnual Service Kit for Mercury 70HP 75HP 80HP 90HP 115HP 125HP 60HP – OEM 8M0251129\u003c\/h2\u003e\n\n\u003cp\u003eThis comprehensive annual service kit is designed for Mercury outboard engines ranging from 60HP to 125HP. It includes all essential maintenance components needed for a complete yearly service, ensuring your engine runs smoothly and reliably season after season.\u003c\/p\u003e\n\n\u003cp\u003eThis kit directly replaces OEM part number \u003cstrong\u003e8M0251129\u003c\/strong\u003e and provides everything required for routine maintenance, including impeller, seals, gaskets, thermostat, fuel filter, and drain components.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eComplete 17-piece service kit with impeller, thermostat, fuel filter, and all necessary seals and gaskets\u003c\/li\u003e\n  \u003cli\u003eFits Mercury 60HP Bigfoot, 70-90HP (1987-2016), and 115-125HP carbureted models (1987-2005)\u003c\/li\u003e\n  \u003cli\u003eIncludes gear oil pump for convenient fluid changes during service\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse:collapse; width:100%;\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eBrand\u003c\/th\u003e\n      \u003cth\u003ePart Number\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMercury\u003c\/td\u003e\n      \u003ctd\u003e8M0251129\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\n\u003cp\u003eConfirm your engine model\/year in the table below. For Mercury owners, here's a guide to help you identify your engine's serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/mercury-outboard-serial-number-guide\" target=\"_blank\" rel=\"nofollow noopener\"\u003eMercury Serial Number Guide\u003c\/a\u003e. You can also review exploded diagrams to verify part numbers: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/diagrams\/mercury-parts-catalog\" target=\"_blank\" rel=\"nofollow noopener\"\u003eMercury Parts Diagrams \u0026amp; Catalog\u003c\/a\u003e.\u003c\/p\u003e\n\n\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\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\u003c\/td\u003e\n        \u003ctd\u003eVarious\u003c\/td\u003e\n        \u003ctd\u003e70, 75, 80, 90 HP\u003c\/td\u003e\n        \u003ctd\u003e1987-2016\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eVarious\u003c\/td\u003e\n        \u003ctd\u003e115-125 HP\u003c\/td\u003e\n        \u003ctd\u003e1987-2005\u003c\/td\u003e\n        \u003ctd\u003eCarburettor models only\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eBigfoot\u003c\/td\u003e\n        \u003ctd\u003e60 HP\u003c\/td\u003e\n        \u003ctd\u003eS\/N 0G590000 - 0T979999\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse:collapse; width:100%;\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eSpecification\u003c\/th\u003e\n      \u003cth\u003eValue\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eOEM Part Number\u003c\/td\u003e\n      \u003ctd\u003e8M0251129\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eKit Type\u003c\/td\u003e\n      \u003ctd\u003eAnnual Service Kit\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eTotal Components\u003c\/td\u003e\n      \u003ctd\u003e17 pieces\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eApplication\u003c\/td\u003e\n      \u003ctd\u003eMercury Outboard Engines\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 annual service kit includes the following components:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e47-43026Q02\u003c\/strong\u003e (Impeller) x 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e26-8M2014338\u003c\/strong\u003e (Seal) x 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2210\u003c\/strong\u003e (Seal) x 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8172761\u003c\/strong\u003e (Plate) x 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e25-21836\u003c\/strong\u003e (O-ring) x 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e27-8M0142616\u003c\/strong\u003e (Gasket) x 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e27-8172771\u003c\/strong\u003e (Gasket) x 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e28-8M0032833\u003c\/strong\u003e (Key) x 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e26-45577\u003c\/strong\u003e (Seal) x 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e25-90196\u003c\/strong\u003e (O-ring) x 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e26-830749\u003c\/strong\u003e (Gasket) x 3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e803061T1\u003c\/strong\u003e (Thermostat) x 1\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e35-877565T1\u003c\/strong\u003e (Fuel Filter) x 1\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8M007119\u003c\/strong\u003e (Drain Gasket) x 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e830749\u003c\/strong\u003e (Drain Gasket) x 3\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e24OP149\u003c\/strong\u003e (Gear Oil Pump) x 1\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n  \u003cli\u003eEnsure the engine is off and cool before beginning any maintenance work. Disconnect the battery and fuel line for safety.\u003c\/li\u003e\n  \u003cli\u003eRemove the lower unit from the engine following your Mercury service manual procedures. Place the unit on a clean work surface.\u003c\/li\u003e\n  \u003cli\u003eRemove the old water pump housing and impeller assembly. Inspect the housing for wear or damage.\u003c\/li\u003e\n  \u003cli\u003eInstall the new impeller (47-43026Q02) with a light coating of marine grease, ensuring the blades face the correct direction. Install the new plate (8172761) and key (28-8M0032833).\u003c\/li\u003e\n  \u003cli\u003eReplace all seals (26-8M2014338, 2210, 26-45577) and O-rings (25-21836, 25-90196) in their respective positions. Ensure proper seating to prevent leaks.\u003c\/li\u003e\n  \u003cli\u003eInstall new gaskets (27-8M0142616, 27-8172771, 26-830749) on the water pump housing and reassemble the pump assembly.\u003c\/li\u003e\n  \u003cli\u003eDrain the lower unit gear oil completely and inspect for contaminants. Use the included gear oil pump (24OP149) to refill with fresh Mercury gear lube to the proper level.\u003c\/li\u003e\n  \u003cli\u003eInstall new drain gaskets (8M007119, 830749) on all drain and fill plugs. Tighten plugs to manufacturer specifications.\u003c\/li\u003e\n  \u003cli\u003eReplace the thermostat (803061T1) in the powerhead, ensuring the temperature rating matches your engine requirements. Install with a new gasket.\u003c\/li\u003e\n  \u003cli\u003eInstall the new fuel filter (35-877565T1) in the fuel system, ensuring proper flow direction. Check all fuel line connections for security.\u003c\/li\u003e\n  \u003cli\u003eReattach the lower unit to the engine, torquing all fasteners to factory specifications. Reconnect the fuel line and battery.\u003c\/li\u003e\n  \u003cli\u003eStart the engine and check for proper water flow from the tell-tale. Inspect all service points for leaks and proper 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 confirm this kit fits my specific Mercury engine?\u003c\/strong\u003e\u003cbr\u003e\nA: Cross-reference your engine's HP rating and year with the compatibility table above. For 60HP Bigfoot models, verify your serial number falls within the range 0G590000 to 0T979999. If you have a 115-125HP engine, confirm it's a carbureted model (not EFI) from 1987-2005.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I perform this annual service?\u003c\/strong\u003e\u003cbr\u003e\nA: Mercury recommends performing this comprehensive service every 100 hours of operation or once per year, whichever comes first. If you operate in saltwater, sandy conditions, or use your engine heavily, consider servicing more frequently.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs that my impeller needs replacement?\u003c\/strong\u003e\u003cbr\u003e\nA: Common symptoms include weak water flow from the tell-tale, engine overheating, steam from the engine, or visible damage to impeller blades during inspection. If your engine is running hot or water flow is reduced, replace the impeller immediately to prevent damage.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I use this kit on EFI (fuel-injected) Mercury engines?\u003c\/strong\u003e\u003cbr\u003e\nA: This kit is designed for carbureted models only. For 115-125HP engines, verify your model has a carburetor system rather than electronic fuel injection before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Do I need any special tools to install this service kit?\u003c\/strong\u003e\u003cbr\u003e\nA: Basic marine mechanic tools are required, including socket sets, torque wrench, gasket scraper, and marine grease. The included gear oil pump (24OP149) simplifies lower unit servicing. Refer to your Mercury service manual for specific torque specifications and procedures.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What's the difference between OEM and aftermarket service kits?\u003c\/strong\u003e\u003cbr\u003e\nA: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How fast do you ship and how much does it cost?\u003c\/strong\u003e\u003cbr\u003e\nA: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is your warranty and return policy?\u003c\/strong\u003e\u003cbr\u003e\nA: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused \u0026amp; in original condition); please see our policy page or reach out for instructions.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003eVerify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.\u003c\/li\u003e\n  \u003cli\u003eThis product is an aftermarket replacement part and is not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended to ensure safety and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuality Assured:\u003c\/strong\u003e As a trusted manufacturer for over 20 years, we supply top marine brands globally.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Shipping:\u003c\/strong\u003e Free delivery worldwide in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect from Manufacturer:\u003c\/strong\u003e Competitive pricing without compromising quality.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":52418317222201,"sku":"25KM257-2N","price":68.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/kit-25KM257-2N_bf366006-f9e5-42b4-9739-0b1feb8f9ac8.png?v=1776686849","url":"https:\/\/jlmmarine.com\/products\/8m0251129-annual-service-kit-for-mercury-70hp-75hp-80hp-90hp-115hp-125hp-60hp-jlm-marine","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}