{"product_id":"8m0149929-service-kit-for-mercury-v6-v8-jlm-marine","title":"8M0149929 Service Kit for Mercury V6 V8 | JLM Marine","description":"\u003ch2\u003e8M0149929 Service Kit for Mercury V6 V8\u003c\/h2\u003e\n\n\u003cp\u003eThis comprehensive service kit is designed for Mercury V6 and V8 outboard engines, specifically the 175-300 HP models with 3.4L V6 and 4.6L V8 displacements. Engineered to meet OEM specifications, this kit provides all essential maintenance components to keep your engine running at peak performance.\u003c\/p\u003e\n\n\u003cp\u003eThis service kit directly replaces Mercury OEM part number \u003cstrong\u003e8M0149929\u003c\/strong\u003e, offering a complete maintenance solution in one convenient package. It includes premium-quality oil and fuel filters, lower unit drain gaskets, and a gear oil pump—everything needed for thorough routine service.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eComplete service solution with oil filter, fuel filter, drain gaskets, and gear oil pump\u003c\/li\u003e\n\u003cli\u003eFits Mercury V6 (3.4L) and V8 (4.6L) engines rated 175-300 HP\u003c\/li\u003e\n\u003cli\u003eAll components engineered to OEM specifications for reliable performance\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\u003e8M0149929\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\u003eModel\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003eV6 (3.4L) \u0026amp; V8 (4.6L)\u003c\/td\u003e\n\u003ctd\u003e175-300 HP\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\u003e8M0149929\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Engines\u003c\/td\u003e\n\u003ctd\u003eMercury 175-300 HP V6 (3.4L) \u0026amp; V8 (4.6L)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKit Type\u003c\/td\u003e\n\u003ctd\u003eComplete Service Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\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\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e8M0123025 Oil Filter\u003c\/strong\u003e\u003c\/span\u003e × 1 \u003ca href=\"https:\/\/jlmmarine.com\/products\/oil-filter-for-mercury-135-150-175-200-hp-18-7921\" target=\"_blank\"\u003eView Part →\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e8M0106635 Fuel Filter\u003c\/strong\u003e\u003c\/span\u003e × 1 \u003ca href=\"https:\/\/jlmmarine.com\/products\/water-separating-fuel-filter-for-mercury-175-300hp-35-8m0106635\" target=\"_blank\"\u003eView Part →\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e830749.0 Lower Unit Drain Gasket\u003c\/strong\u003e × 6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e24OP149 Gear Oil Pump\u003c\/strong\u003e × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e830749 Lower Unit Drain Gasket\u003c\/strong\u003e × 6\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 off and cooled down completely. Gather necessary tools including wrenches, a drain pan, and clean rags.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOil Filter Replacement:\u003c\/strong\u003e Locate the oil filter on your engine block. Using an appropriate filter wrench, remove the old oil filter and replace it with the new 8M0123025 filter, hand-tightening securely.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel Filter Replacement:\u003c\/strong\u003e Locate the fuel filter assembly in the fuel line. Disconnect fuel lines carefully, replace the old fuel filter with the new 8M0106635 filter, and reconnect all fuel line connections securely.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLower Unit Service:\u003c\/strong\u003e Position the engine vertically and place a drain pan beneath the lower unit. Remove the drain and vent plugs to allow old gear oil to drain completely.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGasket Replacement:\u003c\/strong\u003e Clean the drain and vent plug surfaces thoroughly. Install new 830749 lower unit drain gaskets on both drain and vent plugs to ensure a proper seal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefill Gear Oil:\u003c\/strong\u003e Using the included 24OP149 gear oil pump, insert the pump nozzle into the lower drain hole. Pump fresh gear oil until it reaches the upper vent hole.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecure Plugs:\u003c\/strong\u003e Quickly install the vent plug with a new gasket while oil is still flowing, then install the drain plug with a new gasket. Tighten both plugs to manufacturer specifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinal Inspection:\u003c\/strong\u003e Wipe down all serviced areas and check for leaks. Start the engine briefly and inspect all filter and plug locations for proper sealing.\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 engine?\u003c\/strong\u003e\u003cbr\u003e\nA: This kit is designed for Mercury V6 (3.4L) and V8 (4.6L) engines rated between 175-300 HP. Verify your engine displacement and horsepower rating on your engine's identification plate or consult your owner's manual. You can also use the Mercury serial number guide linked above to confirm compatibility.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I perform this service on my Mercury outboard?\u003c\/strong\u003e\u003cbr\u003e\nA: Mercury recommends changing the oil and fuel filters every 100 hours of operation or annually, whichever comes first. Lower unit gear oil should be changed every 100 hours or seasonally, especially before winter storage, to prevent moisture accumulation and gear damage.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I reuse the lower unit drain gaskets if they look undamaged?\u003c\/strong\u003e\u003cbr\u003e\nA: No, always replace drain gaskets during service even if they appear intact. Old gaskets compress and lose their sealing ability, which can lead to gear oil leaks and potential lower unit damage. This kit includes 12 gaskets to ensure you have fresh seals for multiple services.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What type of gear oil should I use with the included pump?\u003c\/strong\u003e\u003cbr\u003e\nA: Use Mercury Premium or High Performance gear lube as specified in your owner's manual. The included gear oil pump (24OP149) is designed to work with standard gear oil viscosities and makes the filling process clean and efficient.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are signs that my filters need immediate replacement?\u003c\/strong\u003e\u003cbr\u003e\nA: Common symptoms include reduced engine performance, difficulty starting, rough idling, decreased fuel efficiency, or visible contamination in old filters. If you notice any of these issues between regular service intervals, inspect and replace filters as needed.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is this an OEM or aftermarket part?\u003c\/strong\u003e\u003cbr\u003e\nA: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How fast do you ship and how much does it cost?\u003c\/strong\u003e\u003cbr\u003e\nA: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is your warranty and return policy?\u003c\/strong\u003e\u003cbr\u003e\nA: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused \u0026amp; in original condition); please see our policy page or reach out for instructions.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eVerify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.\u003c\/li\u003e\n\u003cli\u003eThis product is an aftermarket replacement part and is not an OEM component.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended to ensure safety and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality Assured:\u003c\/strong\u003e As a trusted manufacturer for over 20 years, we supply top marine brands globally.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Global Shipping:\u003c\/strong\u003e Free delivery worldwide in 5–15 days.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect from Manufacturer:\u003c\/strong\u003e Competitive pricing without compromising quality.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":52418226028857,"sku":"23KM783","price":42.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/kit-23KM783.png?v=1776686772","url":"https:\/\/jlmmarine.com\/es\/products\/8m0149929-service-kit-for-mercury-v6-v8-jlm-marine","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}