{"product_id":"688-44352-water-pump-impeller-key-for-yamaha-jlm-marine","title":"688-44352 Water Pump Impeller \u0026 Key for Yamaha | JLM Marine","description":"\u003ch2\u003eWater Pump Impeller \u0026amp; Key – Fits Yamaha 2-Stroke 60–90 HP Outboard Motors\u003c\/h2\u003e\n\u003cp\u003eThis aftermarket water pump impeller kit is engineered for Yamaha 2-stroke outboard motors rated 60–90 HP, including C75, P75, C80, C85, CV85, B90, C90, and E75 models from 1984 through 2004 and beyond. Designed to restore efficient cooling system performance, this impeller assembly ensures reliable water flow to prevent engine overheating.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDirect Replacements:\u003c\/strong\u003e Yamaha 688-44352-03-00, 688443520300, 688-44352-03, 6884435203, 688 44352 03 | CEF 500323 | Sierra 18-3070 | Mallory 9-45603\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePackage includes impeller and drive key\/pin for complete installation\u003c\/li\u003e\n\u003cli\u003e6-blade rubber impeller designed for optimal water circulation\u003c\/li\u003e\n\u003cli\u003ePrecision-molded to OEM specifications for reliable fitment\u003c\/li\u003e\n\u003c\/ul\u003e\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 border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"width: 100%; border-collapse: collapse;\"\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 (OEM)\u003c\/td\u003e\n\u003ctd\u003e688-44352-03-00, 688443520300, 688-44352-03, 6884435203, 688 44352 03\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCEF\u003c\/td\u003e\n\u003ctd\u003e500323\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-3070\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMallory\u003c\/td\u003e\n\u003ctd\u003e9-45603\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\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\u003cdiv style=\"overflow-x: auto;\"\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"width: 100%; border-collapse: collapse;\"\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\u003c\/td\u003e\n\u003ctd\u003e60, 70, C75, P75, C80, 90, B90, C90, E75\u003c\/td\u003e\n\u003ctd\u003e60–90 HP\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e2004 and later\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eC85, CV85, 90\u003c\/td\u003e\n\u003ctd\u003e85–90 HP\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1984–1991\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eE75, P75, C75, C85, 90\u003c\/td\u003e\n\u003ctd\u003e75–90 HP\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1992–1996\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"width: 100%; border-collapse: collapse;\"\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\u003eNumber of Blades\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImpeller Height\u003c\/td\u003e\n\u003ctd\u003e1.181 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall Diameter\u003c\/td\u003e\n\u003ctd\u003e2.303 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShaft Diameter\u003c\/td\u003e\n\u003ctd\u003e0.791 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e30 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eRubber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"color: red;\"\u003e\u003cstrong\u003eOutboard Rubber Impeller (6-blade)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: red;\"\u003e\u003cstrong\u003eDrive Key \/ Pin\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisconnect the fuel line\u003c\/strong\u003e and remove the lower unit from the outboard motor following your service manual. Ensure the engine is cool and the ignition is off.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove the water pump housing cover\u003c\/strong\u003e by unscrewing the fastening bolts. Keep all hardware organized for reassembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtract the old impeller\u003c\/strong\u003e carefully using pliers if necessary. Inspect the housing and plate for wear, corrosion, or debris.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClean the pump chamber\u003c\/strong\u003e thoroughly with a soft cloth. Remove any residual gasket material or buildup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLubricate the new impeller blades\u003c\/strong\u003e with glycerin, waterproof grease, or soapy water—never use petroleum-based lubricants. Coat the inside of the pump housing as well.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert the drive key\/pin\u003c\/strong\u003e into the impeller shaft slot, ensuring it is fully seated and properly aligned.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall the new impeller\u003c\/strong\u003e by rotating it in the correct direction (usually counterclockwise) while gently pressing it into the housing. Ensure all blades fold smoothly without kinking.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePosition the pump plate and gasket\u003c\/strong\u003e over the impeller, aligning all bolt holes. Use a new gasket if the old one is damaged.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReinstall the housing cover\u003c\/strong\u003e and tighten bolts in a crisscross pattern to the torque specified in your service manual.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReattach the lower unit\u003c\/strong\u003e to the motor, ensuring proper alignment of the driveshaft and water tube.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReconnect the fuel line\u003c\/strong\u003e and run the engine in a test tank or on muffs. Verify strong water flow from the telltale (pilot) hole.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInspect for leaks\u003c\/strong\u003e around the pump housing. If any are detected, shut down immediately and recheck gasket seating and bolt torque.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I confirm this impeller fits my Yamaha outboard?\u003c\/strong\u003e\u003cbr\u003eCheck the Compatible Engine Models table above for your motor's HP, stroke, and year range. Cross-reference your original Yamaha part number (688-44352-03-00 or equivalent) with the Part Number Cross-Reference table, or consult your engine's service manual and parts diagram.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow often should I replace my water pump impeller?\u003c\/strong\u003e\u003cbr\u003eMost manufacturers recommend annual replacement or every 200–300 operating hours, whichever comes first. If you frequently run in sandy, silty, or debris-laden water, inspect and replace more often to prevent cooling system failure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are the signs of a failing impeller?\u003c\/strong\u003e\u003cbr\u003eCommon symptoms include weak or absent water flow from the telltale hole, engine overheating alarms, steam from the powerhead, or a drop in performance. Cracked, missing, or melted impeller blades during inspection indicate immediate replacement is needed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I reuse the drive key, or must I replace it?\u003c\/strong\u003e\u003cbr\u003eAlways inspect the key for wear, corrosion, or deformation. While it may appear intact, replacing it with the new key included in this kit ensures reliable drive engagement and prevents future slippage or damage.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy did my new impeller fail prematurely?\u003c\/strong\u003e\u003cbr\u003eCommon causes include running the engine dry (even briefly), improper lubrication during installation, debris in the pump housing, a misaligned water tube, or using petroleum-based greases that degrade rubber. Always prime the system and use compatible lubricants.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this an OEM part or aftermarket?\u003c\/strong\u003e\u003cbr\u003eThis 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\u003eWe 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\u003eThis 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\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\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":51940936483129,"sku":"17IY017K","price":15.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/s-l1600_28c97de3-edb4-4475-bb90-bee8275c440b.webp?v=1771121464","url":"https:\/\/jlmmarine.com\/products\/688-44352-water-pump-impeller-key-for-yamaha-jlm-marine","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}