{"product_id":"676-44324-a0-water-pump-impeller-gasket-for-yamaha-c40-jlm-marine","title":"676-44324-A0 Water Pump Impeller Gasket for Yamaha C40 | JLM Marine","description":"\u003ch2\u003eWater Pump Impeller Gasket 676-44324-A0 – Fits Yamaha 2-Stroke 40 HP C40 \u0026amp; OMC 235\/240 Stern Drive\u003c\/h2\u003e\n\n\u003cp\u003eThis water pump impeller gasket is engineered to fit \u003cstrong\u003eYamaha 2-Stroke 40 HP C40 outboards (1990–1997)\u003c\/strong\u003e and \u003cstrong\u003eOMC Cobra 235\/240 stern drive models (1971–1978)\u003c\/strong\u003e. It ensures a reliable seal within the water pump assembly, preventing leaks and maintaining optimal cooling performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDirect Replacements:\u003c\/strong\u003e 676-44324-A0, 676-44324-A0-00, 676-44324-A1.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eEssential component for water pump maintenance and rebuild kits\u003c\/li\u003e\n  \u003cli\u003eDesigned for both outboard and stern drive applications\u003c\/li\u003e\n  \u003cli\u003eSingle gasket included for precise installation\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\u003eYamaha\u003c\/td\u003e\n      \u003ctd\u003e676-44324-A0\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eYamaha\u003c\/td\u003e\n      \u003ctd\u003e676-44324-A0-00\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eYamaha\u003c\/td\u003e\n      \u003ctd\u003e676-44324-A1\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\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\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 Outboard\u003c\/td\u003e\n        \u003ctd\u003eC40\u003c\/td\u003e\n        \u003ctd\u003e40 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1990-1991\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha Outboard\u003c\/td\u003e\n        \u003ctd\u003eC40\u003c\/td\u003e\n        \u003ctd\u003e40 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1992-1997\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eOMC Cobra Stern Drive\u003c\/td\u003e\n        \u003ctd\u003e235\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e1971\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eOMC Cobra Stern Drive\u003c\/td\u003e\n        \u003ctd\u003e235\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e1975-1977\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eOMC Cobra Stern Drive\u003c\/td\u003e\n        \u003ctd\u003e240\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e1978\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\n\u003cp\u003eThis package includes:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\u003cspan style=\"color:red;\"\u003e1 × Water Pump Impeller Gasket (676-44324-A0)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n  \u003cli\u003eDisconnect the engine and ensure it is cool before beginning work.\u003c\/li\u003e\n  \u003cli\u003eRemove the lower unit from the outboard or stern drive following your engine's service manual.\u003c\/li\u003e\n  \u003cli\u003eDisassemble the water pump housing and remove the old impeller and gasket.\u003c\/li\u003e\n  \u003cli\u003eClean all mating surfaces thoroughly, removing any old gasket material or debris.\u003c\/li\u003e\n  \u003cli\u003ePosition the new impeller gasket (676-44324-A0) onto the pump housing, ensuring proper alignment.\u003c\/li\u003e\n  \u003cli\u003eInstall the impeller, ensuring the blades are oriented correctly per manufacturer specifications.\u003c\/li\u003e\n  \u003cli\u003eReassemble the water pump housing, torquing fasteners to the specified values.\u003c\/li\u003e\n  \u003cli\u003eReinstall the lower unit onto the engine, ensuring all mounting bolts are secure.\u003c\/li\u003e\n  \u003cli\u003eRefill the lower unit gear oil and check for proper level.\u003c\/li\u003e\n  \u003cli\u003eTest the cooling system by running the engine in water and verifying consistent water flow from the tell-tale.\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 gasket fits my engine?\u003c\/strong\u003e\u003cbr\u003e\nA: Cross-reference your original part number (676-44324-A0, 676-44324-A0-00, or 676-44324-A1) and verify your engine model and year in the compatibility table above. For Yamaha engines, use the serial number guide linked in the compatibility section.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace the water pump gasket?\u003c\/strong\u003e\u003cbr\u003e\nA: Replace the gasket every time you service or rebuild the water pump, typically every 2–3 years or 200–300 hours of operation. Always use a new gasket during impeller replacement to ensure a proper seal.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs that my water pump gasket has failed?\u003c\/strong\u003e\u003cbr\u003e\nA: Common symptoms include overheating, reduced water flow from the tell-tale, visible leaks around the pump housing, or steam coming from the engine. If you notice any of these signs, inspect and replace the gasket immediately.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I reuse the old gasket during reinstallation?\u003c\/strong\u003e\u003cbr\u003e\nA: No, always install a new gasket when servicing the water pump. Reusing old gaskets can lead to improper sealing, leaks, and cooling system failure.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is this gasket compatible with both outboard and stern drive applications?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes, this gasket fits Yamaha 40 HP C40 outboards (1990–1997) and OMC Cobra 235\/240 stern drives (1971–1978) as specified in the compatibility table.\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":51966114038073,"sku":"2200","price":16.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/12_6829bc62-c408-4bc1-b565-ef1900b083f0.jpg?v=1771923884","url":"https:\/\/jlmmarine.com\/products\/676-44324-a0-water-pump-impeller-gasket-for-yamaha-c40-jlm-marine","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}