{"product_id":"8m0090558-service-kit-for-mercury-40hp-50hp-60hp-efi-jlm-marine","title":"8M0090558 Service Kit for Mercury 40HP 50HP 60HP EFI | JLM Marine","description":"\u003ch2\u003e8M0090558 Service Kit for Mercury 40HP 50HP 60HP EFI\u003c\/h2\u003e\n\n\u003cp\u003eThis comprehensive service kit is specifically designed for \u003cstrong\u003eMercury 40HP, 50HP, and 60HP EFI outboard engines\u003c\/strong\u003e. It provides all the essential maintenance components needed for a complete routine service, ensuring your engine runs at peak performance and reliability.\u003c\/p\u003e\n\n\u003cp\u003eThis kit directly replaces OEM part number \u003cstrong\u003e8M0090558\u003c\/strong\u003e, offering a cost-effective solution for scheduled maintenance without compromising on quality or fit.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eComplete service kit with oil filter, fuel filters, thermostat, gaskets, and gear oil pump\u003c\/li\u003e\n  \u003cli\u003eDesigned for Mercury EFI (Electronic Fuel Injection) outboards\u003c\/li\u003e\n  \u003cli\u003eIncludes all critical maintenance components in one convenient package\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\u003e8M0090558\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\n\u003cp\u003eConfirm your engine model\/year in the table below. For Mercury owners, here's a guide to help you identify your engine's serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/mercury-outboard-serial-number-guide\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Serial Number Guide\u003c\/a\u003e. You can also review exploded diagrams to verify part numbers: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/diagrams\/mercury-parts-catalog\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Parts Diagrams \u0026amp; Catalog\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse:collapse; width:100%;\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eBrand\u003c\/th\u003e\n      \u003cth\u003eRated HP\u003c\/th\u003e\n      \u003cth\u003eEngine Type\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\u003e40 HP\u003c\/td\u003e\n      \u003ctd\u003eEFI\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMercury\u003c\/td\u003e\n      \u003ctd\u003e50 HP\u003c\/td\u003e\n      \u003ctd\u003eEFI\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMercury\u003c\/td\u003e\n      \u003ctd\u003e60 HP\u003c\/td\u003e\n      \u003ctd\u003eEFI\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse:collapse; width:100%;\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eSpecification\u003c\/th\u003e\n      \u003cth\u003eValue\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eOEM Number\u003c\/td\u003e\n      \u003ctd\u003e8M0090558\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eApplication\u003c\/td\u003e\n      \u003ctd\u003eMercury 40HP, 50HP, 60HP EFI Outboards\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eKit Type\u003c\/td\u003e\n      \u003ctd\u003eComplete Service\/Maintenance Kit\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\n\u003cp\u003eThis service kit includes the following components:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8M0162829\u003c\/strong\u003e - Oil Filter × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e879884T\u003c\/strong\u003e - Fuel Filter × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8M0153652\u003c\/strong\u003e - Fuel Filter × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8M0117413\u003c\/strong\u003e - Thermostat × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e824853.0\u003c\/strong\u003e - Thermostat Gasket × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8M0007119\u003c\/strong\u003e - Oil Plug Drain Gasket × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e830749.0\u003c\/strong\u003e - Lower Unit Drain Gasket × 3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e24OP149\u003c\/strong\u003e - Gear Oil Pump × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePreparation:\u003c\/strong\u003e Ensure the engine is cool and the outboard is in a stable, upright position. Gather all necessary tools including wrenches, drain pan, and the gear oil pump included in this kit.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOil Change:\u003c\/strong\u003e Remove the oil drain plug using the new drain gasket and drain old engine oil into a suitable container. Replace the old oil filter with the new one, applying a thin coat of oil to the gasket before installation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFuel Filter Replacement:\u003c\/strong\u003e Locate and remove the old fuel filters. Install the new fuel filters ensuring proper orientation and secure connections to prevent leaks.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThermostat Service:\u003c\/strong\u003e Remove the thermostat housing cover and extract the old thermostat. Install the new thermostat with fresh gaskets ensuring correct orientation for proper coolant flow.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLower Unit Service:\u003c\/strong\u003e Remove all three lower unit drain and fill plugs, allowing old gear oil to drain completely. Inspect the oil for metal shavings or water contamination.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLower Unit Refill:\u003c\/strong\u003e Using the included gear oil pump and new drain gaskets, pump fresh gear oil into the lower fill hole until it emerges from the top vent hole. Replace plugs starting with the top vent first, then the lower drain\/fill plug.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSystem Check:\u003c\/strong\u003e Refill engine oil to the proper level per your owner's manual specifications. Start the engine and check for any leaks around filter and gasket areas.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinal Inspection:\u003c\/strong\u003e Allow the engine to reach operating temperature and verify proper thermostat operation by monitoring coolant flow. Recheck all drain plugs and filters for secure installation and no leakage.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm this service kit fits my Mercury outboard?\u003c\/strong\u003e\u003cbr\u003e\nA: This kit is designed specifically for Mercury 40HP, 50HP, and 60HP EFI models. Verify your engine's horsepower rating and confirm it has electronic fuel injection (EFI). You can cross-reference the OEM part number 8M0090558 in your owner's manual.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I perform this service on my Mercury EFI outboard?\u003c\/strong\u003e\u003cbr\u003e\nA: Mercury recommends a complete service every 100 hours of operation or annually, whichever comes first. In harsh conditions, consider more frequent intervals to maintain optimal engine performance and longevity.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I use individual replacement parts instead of purchasing the entire kit?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes, individual components are available separately; however, this complete service kit offers better value and ensures you have all necessary maintenance items on hand.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are signs that my fuel filters or thermostat need replacement?\u003c\/strong\u003e\u003cbr\u003e\nA: Fuel filter issues often manifest as rough idling, hesitation under acceleration, or difficulty starting. Thermostat problems typically cause overheating, prolonged warm-up times, or inconsistent operating temperatures.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is the gear oil pump reusable for future lower unit services?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes, the included gear oil pump is a durable tool designed for multiple uses. Clean it thoroughly after each use and store it properly.\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.\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.\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. Returns are accepted within our standard return window.\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.\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":52418225996089,"sku":"23KM779","price":48.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/kit-23KM779.png?v=1776686769","url":"https:\/\/jlmmarine.com\/products\/8m0090558-service-kit-for-mercury-40hp-50hp-60hp-efi-jlm-marine","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}