{"product_id":"water-pump-impeller-kit-fits-yamaha-4hp-5hp-2-stroke-f4-f5-f6-4-stroke-replaces-6e0-w0078-a2-00-18-3410","title":"Water Pump Impeller Kit – Fits Yamaha 4HP\/5HP 2-Stroke, F4\/F5\/F6 4-Stroke (Replaces 6E0-W0078-A2-00, 18-3410)","description":"\u003cstyle\u003e\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\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  table.ss-table th {\n    white-space:nowrap; word-break:normal; letter-spacing:normal; font-weight:600; background:#f8fafc;\n  }\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 complete \u003cstrong\u003eWater Pump Impeller Kit – Fits Yamaha 4HP\/5HP 2-Stroke, F4\/F5\/F6 4-Stroke (Replaces 6E0-W0078-A2-00)\u003c\/strong\u003e provides all necessary components for a full water pump service. It is designed for Yamaha 2-Stroke 4HP and 5HP models (1988–2019) and 4-Stroke F4, F5, and F6 single-cylinder outboards (1998–2011), ensuring reliable engine cooling and performance.\u003c\/p\u003e\n  \u003cp\u003eThis kit serves as a direct replacement for Yamaha OEM part numbers 6E0-W0078-A2-00, 6E0-W0078-00-00, 6E0-W0078-01-00, 6E0-W0078-02-00, and 6E0-W0078-A3-00, as well as Sierra 18-3410 and AM6E0-W0078-A2.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eEngineered for direct-fit installation, matching OEM specifications.\u003c\/li\u003e\n    \u003cli\u003eIncludes a high-quality rubber impeller and durable housing components.\u003c\/li\u003e\n    \u003cli\u003eComplete kit contains all essential seals, gaskets, and hardware for a full service.\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.\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\u003eSierra\u003c\/td\u003e\n          \u003ctd\u003e18-3410\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eGeneric Aftermarket\u003c\/td\u003e\n          \u003ctd\u003eAM6E0-W0078-A2\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 kit is designed specifically for the listed Yamaha outboard models. Please verify your engine's model and year range before ordering.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"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\u003e4A, 4AC, 4ACMH, 4CMH\u003c\/td\u003e\n          \u003ctd\u003e4\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1988–2019\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\u003e1988–2015\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\u003e1998–2011\u003c\/td\u003e\n          \u003ctd\u003e6E0-W0078-A2-00\u003c\/td\u003e\n          \u003ctd\u003e1-cylinder models\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYamaha\u003c\/td\u003e\n          \u003ctd\u003eF5\u003c\/td\u003e\n          \u003ctd\u003e5\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1998–2011\u003c\/td\u003e\n          \u003ctd\u003e6E0-W0078-A2-00\u003c\/td\u003e\n          \u003ctd\u003e1-cylinder models\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYamaha\u003c\/td\u003e\n          \u003ctd\u003eF6\u003c\/td\u003e\n          \u003ctd\u003e6\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1998–2011\u003c\/td\u003e\n          \u003ctd\u003e6E0-W0078-A2-00\u003c\/td\u003e\n          \u003ctd\u003e1-cylinder models\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 Repair 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\u003eRubber (impeller), Aluminum\/Alloy (components)\u003c\/dd\u003e\n    \u003cdt\u003eHousing Color\u003c\/dt\u003e\n    \u003cdd\u003eBlack (impeller), Silver (metal parts)\u003c\/dd\u003e\n    \u003cdt\u003eFitting Type\u003c\/dt\u003e\n    \u003cdd\u003eDirect fit\u003c\/dd\u003e\n    \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n    \u003cdd\u003eComplete service kit for water pump impeller replacement\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 (6E0-44352-00)\u003c\/li\u003e\n    \u003cli\u003e1 x Water Pump Housing Insert Cup\u003c\/li\u003e\n    \u003cli\u003e1 x Impeller Plate\u003c\/li\u003e\n    \u003cli\u003e1 x Gasket\u003c\/li\u003e\n    \u003cli\u003e1 x Impeller Key\u003c\/li\u003e\n    \u003cli\u003eMounting Hardware (bolts\/screws)\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 remove the engine cover.\u003c\/li\u003e\n    \u003cli\u003eShift the engine into neutral gear.\u003c\/li\u003e\n    \u003cli\u003eRemove the bolts securing the lower unit (gearcase) to the upper casing.\u003c\/li\u003e\n    \u003cli\u003eCarefully lower the gearcase to expose the driveshaft and water pump housing.\u003c\/li\u003e\n    \u003cli\u003eUnbolt and remove the water pump housing cover to access the impeller.\u003c\/li\u003e\n    \u003cli\u003eRemove the old impeller, gasket, wear plate, and insert cup. Note the orientation of the impeller vanes.\u003c\/li\u003e\n    \u003cli\u003eClean all surfaces thoroughly, removing any old gasket material or debris.\u003c\/li\u003e\n    \u003cli\u003eInstall the new components from the kit in reverse order. Lightly grease the new impeller.\u003c\/li\u003e\n    \u003cli\u003eEnsure the impeller key is correctly seated and rotate the driveshaft clockwise while sliding the housing down to bend the vanes correctly.\u003c\/li\u003e\n    \u003cli\u003eRe-install the water pump housing, lower unit, and all bolts to the manufacturer's torque specifications.\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 kit fits my Yamaha engine?\u003c\/summary\u003e\n    \u003cp\u003eThis kit is specifically for Yamaha 4HP\/5HP 2-stroke (1988–2019) and F4\/F5\/F6 4-stroke 1-cylinder models (1998–2011). Please cross-reference your engine model and year with the compatibility table provided. Also, check that your existing part number matches one of the equivalents listed in our Part Number Matrix.\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 symptoms include the engine overheating at idle or low speeds, a weak or non-existent \"telltale\" water stream, or a brittle\/cracked\/melted impeller upon inspection. Reduced cooling performance can cause severe engine damage.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I replace my water pump impeller?\u003c\/summary\u003e\n    \u003cp\u003eFor preventative maintenance, it is recommended to inspect the impeller annually and replace it every 1-2 years or every 100-200 hours of use, whichever comes first. This interval can be shorter if you frequently operate in sandy, silty, or saltwater conditions.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I just replace the impeller and not the whole kit?\u003c\/summary\u003e\n    \u003cp\u003eWhile possible, it is highly recommended to replace all components in the kit—including the housing cup, plate, gaskets, and seals. These parts wear together, and replacing only the impeller can lead to a poor seal and premature failure of the new part.\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). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for 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 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWarranty \u0026amp; returns?\u003c\/summary\u003e\n    \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused T\u0026amp; in original condition). See our policy page or reach out for instructions.\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 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\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 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":50723976413499,"sku":"23KY701","price":52.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_Kit_for_Yamaha__4_-_5_HP_2-stroke_F4_-_F5_-_F6_1_cyl_4-stroke_6E0-W0078-00_-_JLM_MARINE-8289259.jpg?v=1763039027","url":"https:\/\/seasierra.com\/products\/water-pump-impeller-kit-fits-yamaha-4hp-5hp-2-stroke-f4-f5-f6-4-stroke-replaces-6e0-w0078-a2-00-18-3410","provider":"SeaSierra","version":"1.0","type":"link"}