{"product_id":"water-pump-impeller-fits-yamaha-40-70-hp-outboards-replaces-yamaha-6h3-44352-00-00-697-44352-00-00-sierra-18-3069","title":"Water Pump Impeller – Fits Yamaha 40-70 HP Outboards (Replaces Yamaha 6H3-44352-00-00, 697-44352-00-00, Sierra 18-3069)","description":"\u003csection\u003e\n\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis is a replacement \u003cstrong\u003eWater Pump Impeller – Fits Yamaha 40-70 HP Outboards\u003c\/strong\u003e, designed for a wide range of Yamaha 2-stroke and 4-stroke engines from approximately 1984 to 2019. It is compatible with C-series, F-series, P-series, and T-series models within the 40 to 70 horsepower range, ensuring broad application for many common marine engines.\u003c\/p\u003e\n\u003cp\u003eThis component serves as a direct replacement for Yamaha part numbers 6H3-44352-00-00, 6H3-44352-01-00, and Sierra 18-3069. It also supersedes the older Yamaha part 697-44352-00-00.\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003eEasy to install with standard hand tools.\u003c\/li\u003e\n    \u003cli\u003eMade from durable, high-quality neoprene rubber for marine environments.\u003c\/li\u003e\n    \u003cli\u003eSelf-priming design uses the pumped fluid for lubrication during operation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Cross-Reference\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n        \u003cth\u003eSuperseded By\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\u003e697-44352-00-00\u003c\/td\u003e\n        \u003ctd\u003e6H3-44352-00-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e6H3-44352-00-00 \/ 6H3-44352-01-00\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-3069\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\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Yamaha Engine Model Compatibility\"\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\u003e40\u003c\/td\u003e\n                \u003ctd\u003e40\u003c\/td\u003e\n                \u003ctd\u003e2-Stroke \u0026amp; 4-Stroke\u003c\/td\u003e\n                \u003ctd\u003e1997–2019\u003c\/td\u003e\n                \u003ctd\u003e6H3-44352-00-00\u003c\/td\u003e\n                \u003ctd\u003eF40 model included\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003e50\u003c\/td\u003e\n                \u003ctd\u003e50\u003c\/td\u003e\n                \u003ctd\u003e2-Stroke \u0026amp; 4-Stroke\u003c\/td\u003e\n                \u003ctd\u003e1997–2019\u003c\/td\u003e\n                \u003ctd\u003e6H3-44352-00-00\u003c\/td\u003e\n                \u003ctd\u003eF50 model included\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003e60\u003c\/td\u003e\n                \u003ctd\u003e60\u003c\/td\u003e\n                \u003ctd\u003e2-Stroke \u0026amp; 4-Stroke\u003c\/td\u003e\n                \u003ctd\u003e1997–2019\u003c\/td\u003e\n                \u003ctd\u003e6H3-44352-00-00\u003c\/td\u003e\n                \u003ctd\u003eC60, P60, F60 models included\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003e70\u003c\/td\u003e\n                \u003ctd\u003e70\u003c\/td\u003e\n                \u003ctd\u003e2-Stroke \u0026amp; 4-Stroke\u003c\/td\u003e\n                \u003ctd\u003e1997–2019\u003c\/td\u003e\n                \u003ctd\u003e6H3-44352-00-00\u003c\/td\u003e\n                \u003ctd\u003eC70, F70 models included\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003eT50\u003c\/td\u003e\n                \u003ctd\u003e50\u003c\/td\u003e\n                \u003ctd\u003e4-Stroke\u003c\/td\u003e\n                \u003ctd\u003e1997–2005\u003c\/td\u003e\n                \u003ctd\u003e6H3-44352-00-00\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\u003eT60\u003c\/td\u003e\n                \u003ctd\u003e60\u003c\/td\u003e\n                \u003ctd\u003e4-Stroke\u003c\/td\u003e\n                \u003ctd\u003e2003–2005\u003c\/td\u003e\n                \u003ctd\u003e6H3-44352-00-00\u003c\/td\u003e\n                \u003ctd\u003eHigh-thrust model\u003c\/td\u003e\n            \u003c\/tr\u003e\n        \u003c\/tbody\u003e\n    \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eOutboard Water Pump Impeller\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect replacement, hand tool installation\u003c\/dd\u003e\n  \u003cdt\u003eMaterial\u003c\/dt\u003e\n\u003cdd\u003eNeoprene rubber\u003c\/dd\u003e\n  \u003cdt\u003eColor\u003c\/dt\u003e\n\u003cdd\u003eBlack\u003c\/dd\u003e\n  \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003eExternal diameter: 58mm (2.28 inch), Height: 29mm (1.14 inch)\u003c\/dd\u003e\n  \u003cdt\u003eInternal Shaft Diameter\u003c\/dt\u003e\n\u003cdd\u003e20mm (0.79 inch)\u003c\/dd\u003e\n  \u003cdt\u003eNumber of Blades\u003c\/dt\u003e\n\u003cdd\u003e6\u003c\/dd\u003e\n  \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eSelf-priming design, uses pumped fluid for lubrication\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n    \u003cli\u003e1 x Water Pump Impeller (6H3-44352-00-00)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n    \u003cli\u003eDisconnect the battery and shift linkage before beginning work.\u003c\/li\u003e\n    \u003cli\u003eUnbolt and carefully lower the gearcase to access the water pump assembly.\u003c\/li\u003e\n    \u003cli\u003eRemove the water pump housing bolts and slide the housing up the driveshaft.\u003c\/li\u003e\n    \u003cli\u003eInspect the housing and wear plate for scoring or damage; replace if necessary.\u003c\/li\u003e\n    \u003cli\u003eNote the rotational direction of the old impeller vanes before removing it and its key.\u003c\/li\u003e\n    \u003cli\u003eClean all mating surfaces of old gasket material and debris.\u003c\/li\u003e\n    \u003cli\u003eSlide the new impeller key into the driveshaft slot.\u003c\/li\u003e\n    \u003cli\u003eInstall the new impeller by sliding it down the shaft while turning the shaft clockwise to bed the vanes correctly.\u003c\/li\u003e\n    \u003cli\u003eReassemble the water pump housing and install new gaskets.\u003c\/li\u003e\n    \u003cli\u003eReinstall the lower unit, reconnect linkages, and secure the battery.\u003c\/li\u003e\n    \u003cli\u003eStart the engine in water and confirm a steady, strong stream from the water pump indicator (tell-tale).\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I know if my impeller needs replacing?\u003c\/summary\u003e\n  \u003cp\u003eCommon signs of a failing impeller include an engine that overheats at idle or low speeds, a weak or inconsistent water stream from the \"tell-tale\" port, or finding brittle, cracked, or deformed vanes on the old impeller during an inspection. Preventative replacement every 1-2 seasons is recommended.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eThe vanes on the new impeller are straight, but my old one's were curved. Is it defective?\u003c\/summary\u003e\n  \u003cp\u003eNo, this is normal. New impellers have flexible, straight vanes. They will curve into the correct orientation once installed inside the water pump housing and the driveshaft is turned clockwise during installation.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eDo I need to lubricate the new impeller during installation?\u003c\/summary\u003e\n  \u003cp\u003eYes, it's highly recommended to apply a light coat of marine grease or soapy water to the interior of the pump housing and onto the new impeller. This prevents damage during the first few dry rotations on initial startup.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eDoes this part include gaskets or the housing?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is for the water pump impeller only. It does not include gaskets, O-rings, wear plates, or the pump housing. Check the \"What's in the Box\" section for a complete list of included items.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this an OEM or aftermarket part?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is an aftermarket replacement (not OEM). It has been built to OEM-level specifications with comparable materials. All parts are manufactured in an ISO 9002 facility and are batch-inspected for quality and consistency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are the shipping speed and cost?\u003c\/summary\u003e\n  \u003cp\u003eWe ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free to most locations, with expedited options available at checkout where applicable.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat is the warranty and return policy?\u003c\/summary\u003e\n  \u003cp\u003eThis product is covered by a 1-year warranty against manufacturing defects under normal marine use. If an issue arises, please contact our support team with your order details. Returns are accepted within our standard window for items that are unused and in their original condition.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n    \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n    \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723975299387,"sku":"17IY002","price":17.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_for_Yamaha_40_50_55_60_70_HP__6H3-44352-01_-_JLM_MARINE-8288624.png?v=1763039000","url":"https:\/\/seasierra.com\/products\/water-pump-impeller-fits-yamaha-40-70-hp-outboards-replaces-yamaha-6h3-44352-00-00-697-44352-00-00-sierra-18-3069","provider":"SeaSierra","version":"1.0","type":"link"}