{"product_id":"6h4-w006a-00-water-pump-repair-kit-for-yamaha-50hp-2-stroke-3-cylinder-jlm-marine","title":"6H4-W006A-00 Water Pump Repair Kit for Yamaha 50HP 2-Stroke 3-Cylinder | JLM Marine","description":"\u003ch2\u003eWater Pump Repair Kit – Fits Yamaha 50HP 2-Stroke 3-Cylinder (1984-1994)\u003c\/h2\u003e\n\n\u003cp\u003eThis comprehensive water pump repair kit is engineered for \u003cstrong\u003eYamaha 50HP 2-Stroke 3-Cylinder outboard engines\u003c\/strong\u003e manufactured between 1984 and 1994. Designed to restore your cooling system to optimal performance, this kit includes all essential gaskets, seals, impeller, thermostat, and related components needed for a complete water pump overhaul.\u003c\/p\u003e\n\n\u003cp\u003eDirect replacement for OEM part number \u003cstrong\u003e6H4-W006A-00\u003c\/strong\u003e, this aftermarket kit delivers reliable performance and proper fitment for your Yamaha outboard's cooling system maintenance.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eComplete rebuild kit with impeller, gaskets, thermostat, and wear plate\u003c\/li\u003e\n\u003cli\u003eIncludes bonus fuel filter and gear oil pump for extended maintenance\u003c\/li\u003e\n\u003cli\u003eSuitable for 2-stroke marine applications requiring regular cooling system 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\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e6H4-W006A-00\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 Yamaha owners, here's a guide to help you identify your engine's serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/yamaha-outboard-serial-number-guide-2025\" rel=\"nofollow noopener\" target=\"_blank\"\u003eYamaha Serial Number Guide\u003c\/a\u003e. You can also review exploded diagrams to verify part numbers: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/yamaha-outboard-parts-diagrams-catalog\" rel=\"nofollow noopener\" target=\"_blank\"\u003eYamaha 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\u003eStroke\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e50HP\u003c\/td\u003e\n\u003ctd\u003e2-Stroke (3-Cylinder)\u003c\/td\u003e\n\u003ctd\u003e1984-1994\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 Part Number\u003c\/td\u003e\n\u003ctd\u003e6H4-W006A-00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits Engine\u003c\/td\u003e\n\u003ctd\u003eYamaha 50HP 2-Stroke 3-Cylinder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYear Range\u003c\/td\u003e\n\u003ctd\u003e1984-1994\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eWater Pump Repair 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 complete repair kit includes the following components:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e663-44315-A0\u003c\/strong\u003e (Gasket) × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e663-44316-A0\u003c\/strong\u003e (Gasket) × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e663-44322-00\u003c\/strong\u003e (Cup, Insert) × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e663-44323-00\u003c\/strong\u003e (Plate, Wear) × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e663-44324-A0\u003c\/strong\u003e (Gasket) × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e663-44366-00\u003c\/strong\u003e (Grommet) × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e90280-03024\u003c\/strong\u003e (Key) × 1\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e6H4-44352-02\u003c\/strong\u003e (Impeller) × 1\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e97080-08045\u003c\/strong\u003e (Bolt) × 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e97080-08055\u003c\/strong\u003e (Bolt) × 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e61N-24560-00\u003c\/strong\u003e (Fuel Filter) × 1\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e6E5-12411-30\u003c\/strong\u003e (Thermostat) × 1\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6J8-12414-A0\u003c\/strong\u003e (Thermostat Gasket) × 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e90430-08020\u003c\/strong\u003e (Drain Gasket) × 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e91490-30025\u003c\/strong\u003e (Cotter Pin) × 1\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 engine from the fuel supply and ensure the engine is completely cool before beginning work.\u003c\/li\u003e\n\u003cli\u003eRemove the lower unit by loosening the mounting bolts and carefully separating it from the mid-section.\u003c\/li\u003e\n\u003cli\u003eLocate the water pump housing on the top of the lower unit driveshaft and remove the securing bolts.\u003c\/li\u003e\n\u003cli\u003eCarefully remove the old impeller, noting the direction of the blades for proper installation.\u003c\/li\u003e\n\u003cli\u003eClean all gasket surfaces thoroughly, removing any old gasket material and debris.\u003c\/li\u003e\n\u003cli\u003eInstall the new wear plate (663-44323-00) into the pump housing with the smooth side facing the impeller.\u003c\/li\u003e\n\u003cli\u003eLubricate the new impeller with water-resistant marine grease and install it with blades facing the correct rotation direction.\u003c\/li\u003e\n\u003cli\u003ePlace the insert cup (663-44322-00) over the impeller and position the new gaskets in their respective locations.\u003c\/li\u003e\n\u003cli\u003eInstall the thermostat (6E5-12411-30) with its new gasket (6J8-12414-A0) into the thermostat housing.\u003c\/li\u003e\n\u003cli\u003eReassemble the water pump housing, torquing all bolts to manufacturer specifications using the provided new bolts.\u003c\/li\u003e\n\u003cli\u003eReattach the lower unit to the mid-section, ensuring proper alignment and secure all mounting hardware.\u003c\/li\u003e\n\u003cli\u003eTest the cooling system by running the engine in a test tank or on-water, verifying proper water flow from the tell-tale indicator.\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 Yamaha 50HP engine?\u003c\/strong\u003e\u003cbr\u003e\nA: Verify that your engine is a 2-stroke 3-cylinder model manufactured between 1984 and 1994. Cross-reference your current water pump kit's OEM number (6H4-W006A-00) or consult your engine's parts diagram using the Yamaha serial number guide linked above.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace my water pump impeller and related components?\u003c\/strong\u003e\u003cbr\u003e\nA: Yamaha recommends inspecting the water pump annually and replacing the impeller every 2-3 years or 200-300 hours of operation, whichever comes first. If you notice reduced water flow, overheating, or visible impeller damage, replace immediately.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs that my water pump is failing?\u003c\/strong\u003e\u003cbr\u003e\nA: Common symptoms include weak or no water discharge from the tell-tale indicator, engine overheating warnings, steam from the engine, reduced water pressure, or unusual noises from the lower unit. Address these issues promptly to prevent engine damage.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Do I need to replace all components in the kit, or can I just change the impeller?\u003c\/strong\u003e\u003cbr\u003e\nA: While the impeller is the primary wear item, it's highly recommended to replace all gaskets, seals, and the wear plate during service. Old gaskets can cause leaks, and a worn wear plate reduces impeller efficiency and lifespan.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What's the difference between this aftermarket kit and the original Yamaha OEM kit?\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":52418549252409,"sku":"25KY488-2","price":68.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/kit-25KY488-2_244b7a01-9d30-4431-9304-f6328f523d85.png?v=1776687045","url":"https:\/\/jlmmarine.com\/ru\/products\/6h4-w006a-00-water-pump-repair-kit-for-yamaha-50hp-2-stroke-3-cylinder-jlm-marine","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}