{"product_id":"8m0149930-maintenance-kit-for-mercury-v6-v8-jlm-marine","title":"8M0149930 Maintenance Kit for Mercury V6 V8 | JLM Marine","description":"\u003ch2\u003e8M0149930 Maintenance Kit for Mercury V6 V8 | JLM Marine\u003c\/h2\u003e\n\n\u003cp\u003eThis comprehensive maintenance kit is engineered for Mercury V6 3.4L (200-350 HP) and V8 4.6L outboard engines, including CMS SeaPro \u0026amp; ProXS models as well as V8 4.6L 250-300hp AMS Sea-Pro and Racing applications. It provides all essential service components for thorough preventive maintenance in a single package.\u003c\/p\u003e\n\n\u003cp\u003eDirect replacement for OEM part number \u003cstrong\u003e8M0149930\u003c\/strong\u003e, this kit consolidates critical wear items—impellers, seals, gaskets, filters, and thermostat—to streamline your service routine and ensure reliable engine performance.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eIncludes impeller, thermostat, fuel filter, oil filter, and all necessary seals and gaskets\u003c\/li\u003e\n  \u003cli\u003eComplete service solution for V6 and V8 Mercury outboards\u003c\/li\u003e\n  \u003cli\u003eGear oil pump included for convenient fluid changes\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\u003e8M0149930\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\u003c\/td\u003e\n      \u003ctd\u003eV6 3.4L\u003c\/td\u003e\n      \u003ctd\u003e200-350 HP\u003c\/td\u003e\n      \u003ctd\u003eCMS SeaPro \u0026amp; ProXS\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMercury\u003c\/td\u003e\n      \u003ctd\u003eV8 4.6L\u003c\/td\u003e\n      \u003ctd\u003e250-300 HP\u003c\/td\u003e\n      \u003ctd\u003eAMS Sea-Pro and Racing\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\u003e8M0149930\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eApplication\u003c\/td\u003e\n      \u003ctd\u003eV6 3.4L 200-350 HP; V8 4.6L 250-300 HP\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eKit Type\u003c\/td\u003e\n      \u003ctd\u003eComprehensive 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 maintenance kit includes the following components:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e47-43026Q02\u003c\/strong\u003e (Impeller) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e26-8M2014338\u003c\/strong\u003e (Seal) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2210\u003c\/strong\u003e (Seal) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8172761\u003c\/strong\u003e (Plate) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e25-21836\u003c\/strong\u003e (O-ring) × 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e27-8M0142616\u003c\/strong\u003e (Plate) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e27-8172771\u003c\/strong\u003e (Gasket) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e28-8M0032833\u003c\/strong\u003e (Key) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e27-8M46938\u003c\/strong\u003e (Gasket) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e25-8M0142659\u003c\/strong\u003e (Seal) × 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e26-830749\u003c\/strong\u003e (Seal Formed) × 2\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e8M0162139\u003c\/strong\u003e (Thermostat) × 1\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e35-8M0106635\u003c\/strong\u003e (Fuel Filter) × 1\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e35-8M0123025\u003c\/strong\u003e (Oil Filter) × 1\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8M007119\u003c\/strong\u003e (Drain Gasket) × 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e830749\u003c\/strong\u003e (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\u003eDisconnect the battery and ensure the engine is cool before beginning maintenance work.\u003c\/li\u003e\n  \u003cli\u003eRemove the lower unit according to your engine's service manual to access the water pump housing.\u003c\/li\u003e\n  \u003cli\u003eDisassemble the water pump housing and remove the old impeller. Inspect the housing for wear or corrosion.\u003c\/li\u003e\n  \u003cli\u003eInstall the new impeller (47-43026Q02) with a light coating of marine grease on the blades, ensuring proper rotation direction.\u003c\/li\u003e\n  \u003cli\u003eReplace the water pump plate (8172761) and install new gaskets (27-8172771, 27-8M46938) and seals as indicated in the kit.\u003c\/li\u003e\n  \u003cli\u003eInstall new O-rings (25-21836) and seals (25-8M0142659, 26-830749, 26-8M2014338, 2210) in their designated locations.\u003c\/li\u003e\n  \u003cli\u003eReplace the thermostat (8M0162139) in the cooling system housing, ensuring proper orientation and seal placement.\u003c\/li\u003e\n  \u003cli\u003eChange the engine oil and replace the oil filter (35-8M0123025) with a new drain gasket (8M007119).\u003c\/li\u003e\n  \u003cli\u003eReplace the fuel filter (35-8M0106635) according to manufacturer specifications, checking fuel lines for cracks or leaks.\u003c\/li\u003e\n  \u003cli\u003eUse the gear oil pump (24OP149) to drain old lower unit oil and refill with fresh marine gear oil until it flows from the upper vent hole. Install drain gaskets (830749) on both drain and fill plugs.\u003c\/li\u003e\n  \u003cli\u003eReassemble the lower unit to the engine, torquing all fasteners to specification and ensuring proper alignment.\u003c\/li\u003e\n  \u003cli\u003eReconnect the battery, start the engine, and verify strong water flow from the telltale outlet and proper operating temperature.\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 model and horsepower with the compatibility table above. This kit is designed for Mercury V6 3.4L (200-350 HP) and V8 4.6L (250-300 HP) engines in CMS SeaPro, ProXS, AMS Sea-Pro, and Racing configurations. Verify your engine's serial number using the Mercury identification guide linked above.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I perform this maintenance service?\u003c\/strong\u003e\u003cbr\u003e\nA: Mercury recommends annual maintenance or every 100-300 hours of operation, whichever comes first. If you operate in sandy, silty, or debris-heavy water, inspect the impeller and seals more frequently. Always follow your engine's service manual for specific intervals.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs that my impeller or thermostat needs replacement?\u003c\/strong\u003e\u003cbr\u003e\nA: Weak or no water flow from the telltale, engine overheating, or steam from the engine are primary indicators. Worn impeller blades, cracked seals, or a stuck thermostat can cause cooling system failure and serious engine damage if not addressed promptly.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I install this kit myself or do I need a professional?\u003c\/strong\u003e\u003cbr\u003e\nA: If you have mechanical experience and the proper tools, you can perform this service following your engine's manual. However, improper installation—especially of the impeller, seals, or thermostat—can lead to overheating and engine damage. Professional installation is recommended if you're unsure.\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":52418292384057,"sku":"23KM784-4N","price":68.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/kit-23KM784-4N_61f99f22-e10a-4a22-8d4a-536c510d93a8.png?v=1776686827","url":"https:\/\/jlmmarine.com\/es\/products\/8m0149930-maintenance-kit-for-mercury-v6-v8-jlm-marine","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}