{"product_id":"water-pump-impeller-kit-fits-yamaha-9-9-15-hp-outboard-replaces-682-w0078-a1-00","title":"Water Pump Impeller Kit – Fits Yamaha 9.9\/15 HP Outboard (Replaces 682-W0078-A1-00)","description":"\u003ch2\u003eWater Pump Impeller Kit – Fits Yamaha 9.9\/15 HP Outboard (Replaces 682-W0078-A1-00)\u003c\/h2\u003e\n\u003cp\u003eThis water pump impeller repair kit is designed for Yamaha 9.9 HP and 15 HP 2-stroke outboard engines (1984-1995) and select 4-stroke models (1985-2004). It also fits corresponding Mariner outboards that utilize the same part specifications.\u003c\/p\u003e\n\u003cp\u003eThis kit is a direct replacement for Yamaha part numbers 682-W0078-00-00, 682-W0078-01-00, 682-W0078-A1-00, 682-W0078-A2-00, and 682-W0078-A3-00.\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInstallation Type:\u003c\/strong\u003e Direct OEM replacement\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMaterials:\u003c\/strong\u003e Features a marine-grade stainless steel alloy housing with a durable rubber impeller.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eQuality Standard:\u003c\/strong\u003e Manufactured in an ISO9002 certified facility to meet or exceed OEM specifications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ctable\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\u003e682-W0078-00-00\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eYamaha\u003c\/td\u003e\n            \u003ctd\u003e682-W0078-01-00\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eYamaha\u003c\/td\u003e\n            \u003ctd\u003e682-W0078-A1-00\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eYamaha\u003c\/td\u003e\n            \u003ctd\u003e682-W0078-A2-00\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eYamaha\u003c\/td\u003e\n            \u003ctd\u003e682-W0078-A3-00\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSierra\u003c\/td\u003e\n            \u003ctd\u003e18-3148\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eGLM\u003c\/td\u003e\n            \u003ctd\u003e12278\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eGLM\u003c\/td\u003e\n            \u003ctd\u003e12281\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n            \u003ctd\u003e84118M\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n            \u003ctd\u003e46-84277T\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n            \u003ctd\u003e46-84277M\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\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\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003ch3\u003eYamaha Models\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ctable\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            \u003cth\u003eOEM Part No.\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\u003eYamaha\u003c\/td\u003e\n            \u003ctd\u003e9.9D, E9.9D\u003c\/td\u003e\n            \u003ctd\u003e9.9\u003c\/td\u003e\n            \u003ctd\u003e2-Stroke\u003c\/td\u003e\n            \u003ctd\u003e1984-1995\u003c\/td\u003e\n            \u003ctd\u003e682-W0078-A1\u003c\/td\u003e\n            \u003ctd\u003e\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eYamaha\u003c\/td\u003e\n            \u003ctd\u003e15D, E15D\u003c\/td\u003e\n            \u003ctd\u003e15\u003c\/td\u003e\n            \u003ctd\u003e2-Stroke\u003c\/td\u003e\n            \u003ctd\u003e1984-1995\u003c\/td\u003e\n            \u003ctd\u003e682-W0078-A1\u003c\/td\u003e\n            \u003ctd\u003e\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eYamaha\u003c\/td\u003e\n            \u003ctd\u003eF9.9A, AE, AM\u003c\/td\u003e\n            \u003ctd\u003e9.9\u003c\/td\u003e\n            \u003ctd\u003e4-Stroke\u003c\/td\u003e\n            \u003ctd\u003e1985-1996\u003c\/td\u003e\n            \u003ctd\u003e682-W0078-A1\u003c\/td\u003e\n            \u003ctd\u003e\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eYamaha\u003c\/td\u003e\n            \u003ctd\u003eF9.9B, BE, BM\u003c\/td\u003e\n            \u003ctd\u003e9.9\u003c\/td\u003e\n            \u003ctd\u003e4-Stroke\u003c\/td\u003e\n            \u003ctd\u003e1985-1996\u003c\/td\u003e\n            \u003ctd\u003e682-W0078-A1\u003c\/td\u003e\n            \u003ctd\u003e\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eYamaha\u003c\/td\u003e\n            \u003ctd\u003eF9.9\u003c\/td\u003e\n            \u003ctd\u003e9.9\u003c\/td\u003e\n            \u003ctd\u003e4-Stroke\u003c\/td\u003e\n            \u003ctd\u003e1985-2004\u003c\/td\u003e\n            \u003ctd\u003e682-W0078-A1\u003c\/td\u003e\n            \u003ctd\u003e\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eYamaha\u003c\/td\u003e\n            \u003ctd\u003eF8AM, B, BE, BM\u003c\/td\u003e\n            \u003ctd\u003e8\u003c\/td\u003e\n            \u003ctd\u003e4-Stroke\u003c\/td\u003e\n            \u003ctd\u003e1986-1995\u003c\/td\u003e\n            \u003ctd\u003e682-W0078-A1\u003c\/td\u003e\n            \u003ctd\u003e\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eYamaha\u003c\/td\u003e\n            \u003ctd\u003eFT9.9\u003c\/td\u003e\n            \u003ctd\u003e9.9\u003c\/td\u003e\n            \u003ctd\u003e4-Stroke\u003c\/td\u003e\n            \u003ctd\u003e1985-1999\u003c\/td\u003e\n            \u003ctd\u003e682-W0078-A1\u003c\/td\u003e\n            \u003ctd\u003eHigh thrust model\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eYamaha\u003c\/td\u003e\n            \u003ctd\u003eT9.9\u003c\/td\u003e\n            \u003ctd\u003e9.9\u003c\/td\u003e\n            \u003ctd\u003e4-Stroke\u003c\/td\u003e\n            \u003ctd\u003e1991-1999\u003c\/td\u003e\n            \u003ctd\u003e682-W0078-A1\u003c\/td\u003e\n            \u003ctd\u003e\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3\u003eMariner Models\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ctable\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            \u003cth\u003eOEM Part No.\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\u003eMariner\u003c\/td\u003e\n            \u003ctd\u003e9.9C (Code 682)\u003c\/td\u003e\n            \u003ctd\u003e9.9\u003c\/td\u003e\n            \u003ctd\u003e2-Stroke\u003c\/td\u003e\n            \u003ctd\u003eAll Years\u003c\/td\u003e\n            \u003ctd\u003e84118M\u003c\/td\u003e\n            \u003ctd\u003e\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eMariner\u003c\/td\u003e\n            \u003ctd\u003e15C (Code 684)\u003c\/td\u003e\n            \u003ctd\u003e15\u003c\/td\u003e\n            \u003ctd\u003e2-Stroke\u003c\/td\u003e\n            \u003ctd\u003eAll Years\u003c\/td\u003e\n            \u003ctd\u003e84118M\u003c\/td\u003e\n            \u003ctd\u003e\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\u003ctable\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\u003eProduct Type\u003c\/td\u003e\n            \u003ctd\u003eWater Pump Impeller Kit\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInstallation\u003c\/td\u003e\n            \u003ctd\u003eDirect OEM replacement\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eHousing Material\u003c\/td\u003e\n            \u003ctd\u003eMarine-grade stainless steel alloy and rubber\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eHousing Color\u003c\/td\u003e\n            \u003ctd\u003eBlack\/Metal\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOther Technical Attributes\u003c\/td\u003e\n            \u003ctd\u003eManufactured to OEM specifications in ISO9002 certified factory\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003e1 x Impeller\u003c\/strong\u003e (Replaces 682-W0078-A1)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\u003col\u003e\n    \u003cli\u003eDisconnect the battery and remove the engine cover.\u003c\/li\u003e\n    \u003cli\u003eLocate the lower unit and drain the gearcase oil.\u003c\/li\u003e\n    \u003cli\u003eUnbolt and carefully separate the lower unit from the upper casing.\u003c\/li\u003e\n    \u003cli\u003eRemove the water pump housing bolts and lift the housing to expose the old impeller.\u003c\/li\u003e\n    \u003cli\u003eTake note of the old impeller's vane direction before removing it.\u003c\/li\u003e\n    \u003cli\u003eClean the housing interior and inspect it for wear or damage.\u003c\/li\u003e\n    \u003cli\u003eInstall the new impeller, ensuring the vanes are oriented correctly (typically clockwise).\u003c\/li\u003e\n    \u003cli\u003eInstall the new gasket and re-seat the housing, tightening bolts to the manufacturer's torque specs.\u003c\/li\u003e\n    \u003cli\u003eRe-attach the lower unit, ensuring the driveshaft and water tube align.\u003c\/li\u003e\n    \u003cli\u003eRefill the gearcase with fresh oil and re-attach the engine cover.\u003c\/li\u003e\n    \u003cli\u003eStart the engine using a water supply (flushing muffs) and verify water is exiting the tell-tale port.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I confirm this kit fits my specific engine?\u003c\/strong\u003e\u003cbr\u003e\nThe best method is to match your engine's model, horsepower, and year against the compatibility tables above. For certainty, cross-reference the OEM part number stamped on your existing water pump or found in your service manual with the numbers listed in our cross-reference table.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are the signs of a failing water pump impeller?\u003c\/strong\u003e\u003cbr\u003e\nCommon signs include the engine overheating at idle or low speeds, a weak or non-existent water stream from the \"tell-tale\" outlet, and in severe cases, steam from the exhaust. The impeller itself may be brittle, cracked, or have broken vanes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow often should I replace the impeller?\u003c\/strong\u003e\u003cbr\u003e\nFor preventative maintenance, it is recommended to inspect the impeller annually and replace it every 1-2 years, depending on usage (hours) and water conditions (saltwater, sandy\/silty water). Do not wait for it to fail, as overheating can cause severe engine damage.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOEM vs. Aftermarket?\u003c\/strong\u003e\u003cbr\u003e\nThis 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\u003cp\u003e\u003cstrong\u003eHow fast do you ship and how much does it cost?\u003c\/strong\u003e\u003cbr\u003e\nWe 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\u003cp\u003e\u003cstrong\u003eWhat is your warranty and return policy?\u003c\/strong\u003e\u003cbr\u003e\nThis 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\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\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":50482700615993,"sku":"SIE-22KY001","price":38.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/SIE-22KY001_1_ff77d391-fb75-4b00-83a9-c8e618ea33e9.jpg?v=1755252185","url":"https:\/\/jlmmarine.com\/products\/water-pump-impeller-kit-fits-yamaha-9-9-15-hp-outboard-replaces-682-w0078-a1-00","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}