{"product_id":"water-pump-impeller-kit-fits-johnson-evinrude-5-5hp-6hp-7-5hp-replaces-763758-778166-391391-382797","title":"Water Pump Impeller Kit – Fits Johnson Evinrude 5.5HP 6HP 7.5HP (Replaces 763758, 778166, 391391, 382797)","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;\n    word-break:normal;\n    letter-spacing:normal;\n    font-weight:600;\n    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\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003eWater Pump Impeller Kit\u003c\/strong\u003e is designed for Johnson Evinrude OMC outboard engines, specifically fitting 5.5HP (1954–1979), 6HP (1954–1979), and 7.5HP (1954–1958) models equipped with plastic pump housings. It delivers reliable water circulation to prevent overheating and maintain optimal engine performance.\u003c\/p\u003e\n\u003cp\u003eThis kit directly replaces OEM part numbers 763758, 778166, 391391, and 382797, offering broad cross-compatibility for older two-stroke models.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eComplete rebuild kit with impeller, housing, seals, gaskets, and hardware\u003c\/li\u003e\n  \u003cli\u003eCompatible with Johnson Evinrude plastic pump housing systems\u003c\/li\u003e\n  \u003cli\u003eSuitable for freshwater and saltwater applications\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 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\u003eJohnson Evinrude OMC\u003c\/td\u003e\n        \u003ctd\u003e763758\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eJohnson Evinrude OMC\u003c\/td\u003e\n        \u003ctd\u003e778166\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eJohnson Evinrude OMC\u003c\/td\u003e\n        \u003ctd\u003e391391\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eJohnson Evinrude OMC\u003c\/td\u003e\n        \u003ctd\u003e382797\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=\"Engine \u0026amp; Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eYears\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\u003eJohnson Evinrude\u003c\/td\u003e\n        \u003ctd\u003e5.5 HP\u003c\/td\u003e\n        \u003ctd\u003e1954–1979\u003c\/td\u003e\n        \u003ctd\u003eWith Plastic Pump Housing\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eJohnson Evinrude\u003c\/td\u003e\n        \u003ctd\u003e6 HP\u003c\/td\u003e\n        \u003ctd\u003e1954–1979\u003c\/td\u003e\n        \u003ctd\u003eWith Plastic Pump Housing\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eJohnson Evinrude\u003c\/td\u003e\n        \u003ctd\u003e7.5 HP\u003c\/td\u003e\n        \u003ctd\u003e1954–1958\u003c\/td\u003e\n        \u003ctd\u003eWith Plastic Pump Housing\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\u003eOEM Part Number\u003c\/dt\u003e\n  \u003cdd\u003e763758\u003c\/dd\u003e\n  \u003cdt\u003eReplaces\u003c\/dt\u003e\n  \u003cdd\u003e778166, 391391, 382797\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n  \u003cdd\u003eJohnson Evinrude OMC Outboards\u003c\/dd\u003e\n  \u003cdt\u003eHousing Type\u003c\/dt\u003e\n  \u003cdd\u003ePlastic Pump Housing\u003c\/dd\u003e\n  \u003cdt\u003eCompatible HP Range\u003c\/dt\u003e\n  \u003cdd\u003e5.5 HP, 6 HP, 7.5 HP\u003c\/dd\u003e\n  \u003cdt\u003eYear Range\u003c\/dt\u003e\n  \u003cdd\u003e1954–1979 (varies by model)\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cp\u003eThis package is not listed in the provided data. Please refer to the eBay description for details.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDisconnect fuel line and remove engine cowling to access the water pump assembly.\u003c\/li\u003e\n  \u003cli\u003eDrain any residual water from the lower unit and remove the lower unit mounting bolts.\u003c\/li\u003e\n  \u003cli\u003eSeparate the lower unit from the mid-section, taking care not to damage gasket surfaces.\u003c\/li\u003e\n  \u003cli\u003eRemove the old impeller, housing, wear plate, and gaskets from the water pump cavity.\u003c\/li\u003e\n  \u003cli\u003eClean all mating surfaces thoroughly, removing old gasket material and debris.\u003c\/li\u003e\n  \u003cli\u003eInstall the new wear plate, ensuring proper alignment with bolt holes.\u003c\/li\u003e\n  \u003cli\u003eLubricate the new impeller with water-resistant grease and insert it into the housing, aligning the key slot.\u003c\/li\u003e\n  \u003cli\u003eInstall the pump cup and water seal according to orientation marks.\u003c\/li\u003e\n  \u003cli\u003ePlace the new gasket on the mating surface and carefully reassemble the lower unit to the mid-section.\u003c\/li\u003e\n  \u003cli\u003eTorque mounting bolts to manufacturer specifications in a crossing pattern.\u003c\/li\u003e\n  \u003cli\u003eReconnect fuel line, reattach cowling, and test water flow with engine running in a test tank or on muffs.\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 replacement?\u003c\/summary\u003e\n  \u003cp\u003eCommon signs include weak or no water discharge from the tell-tale, engine overheating, steam from the exhaust, or reduced performance. Impellers should be inspected annually and replaced every 2–3 years or sooner in sandy or debris-heavy water.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWill this kit fit models with metal pump housings?\u003c\/summary\u003e\n  \u003cp\u003eNo, this kit is designed exclusively for Johnson Evinrude models with plastic pump housings. Verify your housing material before ordering to ensure proper fitment.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eCan I install this kit myself?\u003c\/summary\u003e\n  \u003cp\u003eInstallation requires basic mechanical skills and hand tools. If you are comfortable removing the lower unit and working with gaskets and seals, this is a manageable DIY project. Professional installation is recommended if you lack experience with outboard servicing.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat is the difference between this kit and the OEM version?\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\u003eHow often should I replace the water pump impeller?\u003c\/summary\u003e\n  \u003cp\u003eMost manufacturers recommend replacing the impeller every 2–3 years or 200–300 hours of operation. If your engine runs in sandy, silty, or saltwater conditions, consider annual replacement to prevent overheating damage.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eDo I need any additional parts or tools?\u003c\/summary\u003e\n  \u003cp\u003eThis is a complete rebuild kit with all essential components. You may need a lower unit gasket set if your engine model uses additional seals. Standard hand tools, a torque wrench, and water-resistant grease are recommended for installation.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat should I do if the kit does not fit my engine?\u003c\/summary\u003e\n  \u003cp\u003eVerify images\/specifications against your original part. If anything differs—even if your model appears compatible—contact support before installation. Returns are accepted within our standard window (unused and in original condition).\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 \u0026amp; in original condition). See our policy page or reach out for 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 against 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","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":51025604018491,"sku":"21KO001","price":24.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/12_2e9f10b9-fcc0-48f0-9ce0-355134cc878d.jpg?v=1772927981","url":"https:\/\/seasierra.com\/products\/water-pump-impeller-kit-fits-johnson-evinrude-5-5hp-6hp-7-5hp-replaces-763758-778166-391391-382797","provider":"SeaSierra","version":"1.0","type":"link"}