{"product_id":"water-pump-impeller-kit-fits-yamaha-4hp-5hp-replaces-6e0-w0078-a2-00","title":"Water Pump Impeller Kit – Fits Yamaha 4HP-5HP (Replaces 6E0-W0078-A2-00)","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 complete \u003cstrong\u003eWater Pump Impeller Kit – Fits Yamaha 4HP \u0026amp; 5HP Outboards (Replaces 6E0-W0078-A2-00)\u003c\/strong\u003e provides everything needed for a full water pump service. It is designed for Yamaha 2-stroke 4HP (1984–1999) and 5HP (1984–2002) models, 4-stroke F4 (1999–2008) models, and specific 1996 Mariner 4HP and 5HP outboards with 6E0 and 6E3 series serial numbers.\u003c\/p\u003e\n\u003cp\u003eThe kit serves as a direct interchange for Yamaha part numbers 6E0-W0078-A2-00, 6E0-W0078-00-00, 6E0-W0078-01-00, 6E0-W0078-02-00, and several others, ensuring broad compatibility.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInstalls as a direct replacement for the original OEM assembly.\u003c\/li\u003e\n\u003cli\u003eFeatures a durable, marine-grade aluminum housing for corrosion resistance.\u003c\/li\u003e\n\u003cli\u003eIncludes all necessary gaskets, seals, and hardware for a complete installation.\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      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e6E0-W0078-A2-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e6E0-W0078-00-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e6E0-W0078-01-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e6E0-W0078-02-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e6E0-W0078-A3-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e6E0-W0078-A4-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e6E0-W0078-A5-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e68D-WG078-00-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e67D-W0078-00-00\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\u003cp\u003eFor Yamaha owners, this kit fits various 4A, 4AC, 5C, and F4 series models produced between 1984 and 2008. Verify your specific model and year range.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Yamaha Engine 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\u003e4A, 4AC, 4ACMH, 4CMH\u003c\/td\u003e\n        \u003ctd\u003e4\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1984–1999\u003c\/td\u003e\n        \u003ctd\u003e6E0-W0078-A2-00\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e5C, 5CM, 5CMH\u003c\/td\u003e\n        \u003ctd\u003e5\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1984–2002\u003c\/td\u003e\n        \u003ctd\u003e6E0-W0078-A2-00\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF4\u003c\/td\u003e\n        \u003ctd\u003e4\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1999–2008\u003c\/td\u003e\n        \u003ctd\u003e6E0-W0078-A2-00\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\u003cp\u003eFor Mariner owners, eligibility is strictly limited to 1996 models with specific serial number prefixes. Please inspect your engine's identification plate before ordering.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Mariner Engine 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\u003eMariner\u003c\/td\u003e\n        \u003ctd\u003e4HP (with serial 6E0)\u003c\/td\u003e\n        \u003ctd\u003e4\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1996\u003c\/td\u003e\n        \u003ctd\u003e6E0-W0078-A2-00\u003c\/td\u003e\n        \u003ctd\u003eOnly for models with 6E0 \u0026amp; 6E3 serial numbers\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMariner\u003c\/td\u003e\n        \u003ctd\u003e5HP (with serial 6E3)\u003c\/td\u003e\n        \u003ctd\u003e5\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1996\u003c\/td\u003e\n        \u003ctd\u003e6E0-W0078-A2-00\u003c\/td\u003e\n        \u003ctd\u003eOnly for models with 6E0 \u0026amp; 6E3 serial numbers\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\u003eWater Pump Impeller Kit\u003c\/dd\u003e\n \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect replacement\u003c\/dd\u003e\n \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eAluminum (marine-grade)\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 Housing, Water Pump (6E0-44311-00-00)\u003c\/li\u003e\n\u003cli\u003e1 x Gasket, Water Pump (6E0-44315-A0-00)\u003c\/li\u003e\n\u003cli\u003e1 x Insert, Cartridge (6E0-44322-02-00)\u003c\/li\u003e\n\u003cli\u003e1 x Outer Plate, Cartridge (6E0-44323-00-00)\u003c\/li\u003e\n\u003cli\u003e1 x Impeller (6E0-44352-00-00)\u003c\/li\u003e\n\u003cli\u003e1 x Damper, Water Seal (6E0-44366-00-00)\u003c\/li\u003e\n\u003cli\u003e1 x Pin, Dowel (93604-09066-00)\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e4 x Bolt\u003c\/span\u003e (97080-06045-00)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eDisconnect the spark plug wire(s) and battery cables for safety.\u003c\/li\u003e\n\u003cli\u003ePlace a drain pan under the lower unit and remove the gear oil drain screw to empty the gearcase.\u003c\/li\u003e\n\u003cli\u003eRemove the bolts securing the lower unit (gearcase) to the upper driveshaft housing. Carefully separate the lower unit.\u003c\/li\u003e\n\u003cli\u003eUnbolt and remove the old water pump housing. Note the orientation of the old impeller vanes.\u003c\/li\u003e\n\u003cli\u003eRemove the old impeller, gaskets, wear plate, and any seals. Clean all mating surfaces thoroughly.\u003c\/li\u003e\n\u003cli\u003eInstall the new gasket, wear plate, and dowel pins from the kit.\u003c\/li\u003e\n\u003cli\u003eSlide the new impeller onto the driveshaft, turning the shaft clockwise to seat the vanes correctly inside the new housing.\u003c\/li\u003e\n\u003cli\u003eInstall the new housing and torque the bolts to the manufacturer's specification.\u003c\/li\u003e\n\u003cli\u003eRe-install the lower unit, ensuring the driveshaft, shift shaft, and water tube align correctly.\u003c\/li\u003e\n\u003cli\u003eRefill the lower unit with the specified marine gear lubricant.\u003c\/li\u003e\n\u003cli\u003eReconnect the battery and spark plug wires. Test the engine in water, confirming a strong stream from the tell-tale outlet.\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 water pump needs replacing?\u003c\/summary\u003e\n\u003cp\u003eCommon signs of a failing water pump include a weak or non-existent water stream from the tell-tale outlet, engine overheating alarms, or discovering a brittle, cracked, or deformed impeller during a routine inspection.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill this kit fit my specific Mariner outboard?\u003c\/summary\u003e\n\u003cp\u003eThis kit is only confirmed to fit 1996 Mariner 4HP and 5HP models that have a serial number containing \"6E0\" or \"6E3\". It is critical to check your engine's identification plate before purchasing as it will not fit other Mariner models or years.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the recommended replacement interval for this kit?\u003c\/summary\u003e\n\u003cp\u003eFor optimal reliability and to prevent engine damage from overheating, we recommend inspecting the impeller annually and replacing the entire water pump kit every 2-3 years or 200-300 running hours, whichever comes first. Usage in saltwater or silty\/sandy conditions may require more frequent service.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes this kit include the outer housing?\u003c\/summary\u003e\n\u003cp\u003eYes, this is a complete repair kit that includes the main water pump housing (replaces 6E0-44311-00-00) along with the impeller, gaskets, cartridge insert, outer plate, and all required installation hardware.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between an OEM and an aftermarket part?\u003c\/summary\u003e\n\u003cp\u003eThis listing is an aftermarket replacement, not a component from the original engine manufacturer (OEM). It is built to OEM-level specifications with comparable materials and manufactured in an ISO 9002 certified facility, with batch-inspections to ensure 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 for most regions. Expedited shipping options, if available for your location, will be presented at checkout.\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 use conditions. Should any issues arise, please contact our support team with your order details. Returns are accepted within our standard window, provided the item is unused and in its original condition. See our full policy page or reach out for return instructions.\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\u003ePro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n\u003cli\u003eFast Global Fulfillment — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n\u003cli\u003eManufacturer-Direct Value — 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":50723969073467,"sku":"SIE-17KY001","price":24.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/SIE-17KY001_1_274adcd4-c65d-448d-94be-b008ef3a723e.jpg?v=1763038745","url":"https:\/\/seasierra.com\/products\/water-pump-impeller-kit-fits-yamaha-4hp-5hp-replaces-6e0-w0078-a2-00","provider":"SeaSierra","version":"1.0","type":"link"}