{"product_id":"water-pump-impeller-fits-yamaha-2hp-2-stroke-replaces-646-44352-01-00","title":"Water Pump Impeller – Fits Yamaha 2HP 2-Stroke (Replaces 646-44352-01-00)","description":"\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 *\/\ntable.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\ntable.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 *\/\ntable.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\u003csection\u003e\n  \u003ch2\u003eProduct Details\u003c\/h2\u003e\n  \u003cp\u003eThis \u003cstrong\u003eWater Pump Impeller – Fits Yamaha 2HP 2-Stroke Outboards (Replaces 646-44352-01-00)\u003c\/strong\u003e is designed for Yamaha's smallest 2-stroke portable outboard motors. It fits models rated at 2 horsepower manufactured from 1989 through 2002, including all 2MSH model variants.\u003c\/p\u003e\n  \u003cp\u003eThis part is a direct replacement for OEM part number 646-44352-01-00 and serves as a cross-reference for Sierra 18-3074, GLM 89880, and Mallory 9-45605.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eEngineered as a direct OEM-equivalent replacement for straightforward installation.\u003c\/li\u003e\n    \u003cli\u003eConstructed from durable, marine-grade neoprene rubber for reliable performance.\u003c\/li\u003e\n    \u003cli\u003eAn essential internal component of the water pump assembly responsible for engine cooling.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n  \u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket brands.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\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\u003e646-44352-01-00\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eSierra\u003c\/td\u003e\n          \u003ctd\u003e18-3074\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eGLM\u003c\/td\u003e\n          \u003ctd\u003e89880\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMallory\u003c\/td\u003e\n          \u003ctd\u003e9-45605\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n  \u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n  \u003cp\u003eThis impeller is compatible with specific Yamaha 2HP 2-stroke outboard models as listed in the official parts catalogs.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; 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\u003e2MSHY\u003c\/td\u003e\n          \u003ctd\u003e2\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e2000\u003c\/td\u003e\n          \u003ctd\u003e646-44352-01-00\u003c\/td\u003e\n          \u003ctd\u003ePart of water pump repair kit 6GD-W0078-00-00\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYamaha\u003c\/td\u003e\n          \u003ctd\u003e2MSHZ\u003c\/td\u003e\n          \u003ctd\u003e2\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e2001\u003c\/td\u003e\n          \u003ctd\u003e646-44352-01-00\u003c\/td\u003e\n          \u003ctd\u003ePart of water pump repair kit 6GD-W0078-00-00\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYamaha\u003c\/td\u003e\n          \u003ctd\u003e2MSHA\u003c\/td\u003e\n          \u003ctd\u003e2\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e2002\u003c\/td\u003e\n          \u003ctd\u003e646-44352-01-00\u003c\/td\u003e\n          \u003ctd\u003ePart of water pump repair kit 6GD-W0078-00-00\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYamaha\u003c\/td\u003e\n          \u003ctd\u003e2MSHP-2MSHX\u003c\/td\u003e\n          \u003ctd\u003e2\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1991–1999\u003c\/td\u003e\n          \u003ctd\u003e646-44352-01-00\u003c\/td\u003e\n          \u003ctd\u003ePart of water pump repair kit 6GD-W0078-00-00\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYamaha\u003c\/td\u003e\n          \u003ctd\u003e2SD-2SF\u003c\/td\u003e\n          \u003ctd\u003e2\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1989–1990\u003c\/td\u003e\n          \u003ctd\u003e646-44352-01-00\u003c\/td\u003e\n          \u003ctd\u003ePart of water pump repair kit 6A1-W0078-02-00\/6GD-W0078-00-00\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eWater Pump Impeller\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect OEM replacement\u003c\/dd\u003e\n    \u003cdt\u003eBlades\u003c\/dt\u003e\n\u003cdd\u003e6\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\u003eOEM Part Number\u003c\/dt\u003e\n\u003cdd\u003e646-44352-01-00\u003c\/dd\u003e\n    \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eInternal component of water pump assembly\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e1 x Impeller (Replaces 646-44352-01-00)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eDisconnect the battery and shut off the fuel supply for safety.\u003c\/li\u003e\n    \u003cli\u003eRemove the lower unit (gearcase) from the outboard motor by unbolting it.\u003c\/li\u003e\n    \u003cli\u003eUnbolt and remove the water pump housing to access the old impeller.\u003c\/li\u003e\n    \u003cli\u003eCarefully inspect the housing, gaskets, and wear plate for cracks, grooves, or corrosion. Replace any worn components.\u003c\/li\u003e\n    \u003cli\u003eClean the interior surfaces of the pump housing.\u003c\/li\u003e\n    \u003cli\u003eSlide the new impeller onto the driveshaft. Apply a light coat of marine grease to the housing interior and align the blades with the direction of engine rotation.\u003c\/li\u003e\n    \u003cli\u003eReassemble the water pump housing, ensuring a tight seal, and reinstall the lower unit.\u003c\/li\u003e\n    \u003cli\u003eOnce assembled, test the engine in water to verify strong and consistent water flow from the tell-tale outlet.\u003c\/li\u003e\n  \u003c\/ol\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I know if this impeller fits my exact engine model?\u003c\/summary\u003e\n    \u003cp\u003eThis impeller is designed for Yamaha 2HP 2-stroke outboards from 1989 to 2002. The best way to ensure a match is to verify your OEM part number is 646-44352-01-00 or one of the listed aftermarket cross-references. You can also consult our compatibility table.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are the signs of a failing water pump impeller?\u003c\/summary\u003e\n    \u003cp\u003eCommon signs include a weak or intermittent stream from the tell-tale (water indicator), engine overheating alarms, or visible cracks and stiffness in the old impeller's blades upon inspection. Reduced cooling performance is the primary symptom.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I replace my outboard's impeller?\u003c\/summary\u003e\n    \u003cp\u003eAs a preventive maintenance measure, it is recommended to inspect your impeller annually and replace it every 1-2 years or every 100-200 hours of operation, depending on usage conditions (e.g., saltwater vs. freshwater).\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this part identical to the genuine Yamaha impeller?\u003c\/summary\u003e\n    \u003cp\u003eThis is an aftermarket part designed to meet or exceed OEM specifications for fit, form, and function. It provides comparable performance and material quality (neoprene rubber) to the original Yamaha part at a better value.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n    \u003cp\u003eThis listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials and manufactured in an ISO 9001 certified facility, with batch inspections for quality and consistency.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eShipping speed \u0026amp; cost\u003c\/summary\u003e\n    \u003cp\u003eWe ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free for most orders, with expedited options available at checkout where applicable.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\n    \u003cp\u003eThis product is covered by a 1-year warranty against manufacturing defects under normal use. If you encounter any issues, please contact our support team with your order details. Returns are accepted within our standard window_ for unused items in their original condition.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eVerify the images and specifications against your original part before purchasing. If anything differs—even if your model is listed as compatible—do not install.\u003c\/li\u003e\n    \u003cli\u003eThis is an aftermarket replacement part, not an original equipment manufacturer (OEM) component.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is highly recommended to ensure safety, proper function, and optimal engine performance.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\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 rigorously tested for real-world reliability.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — We offer free standard delivery to most regions with an average transit time of 5–15 days.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Our model ensures you get fair pricing without compromising on materials or quality control.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723790160187,"sku":"23KY071","price":18.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_Kit_for_Yamaha_2_HP_646-44352-01_-_JLM_MARINE-8288807.jpg?v=1763031848","url":"https:\/\/seasierra.com\/products\/water-pump-impeller-fits-yamaha-2hp-2-stroke-replaces-646-44352-01-00","provider":"SeaSierra","version":"1.0","type":"link"}