{"product_id":"water-pump-impeller-repair-kit-fits-yamaha-4hp-5hp-outboard-replaces-6e0-w0078-a2-00","title":"Water Pump Impeller Repair Kit – Fits Yamaha 4HP\/5HP Outboard (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 \u003cstrong\u003eWater Pump Impeller Repair Kit – Fits Yamaha 4HP\/5HP Outboard Motors (Replaces 6E0-W0078-A2-00)\u003c\/strong\u003e provides the necessary components to service the lower unit water pump on Yamaha 2-stroke 4HP (1984–1999) and 5HP (1984–2002) models, as well as 4-stroke F4 (1999–2008) outboards.\u003c\/p\u003e\n\u003cp\u003eThe kit serves as a direct replacement for Yamaha equivalents 6E0-W0078-A2-00, 6E0-W0078-02-00, 6E0-W0078-01-00, 6E0-W0078-00-00, and Sierra 18-3016.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDirect replacement fit for straightforward installation.\u003c\/li\u003e\n\u003cli\u003eConstructed with a durable neoprene rubber impeller and stainless steel housing plates.\u003c\/li\u003e\n\u003cli\u003eKit includes all essential gaskets, seals, and hardware for a complete service.\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\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-W0078-02-00\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-W0078-00-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-3016\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\u003e\u003cb\u003eFor Yamaha Engines:\u003c\/b\u003e This kit fits a range of 4HP and 5HP 2-stroke models produced from 1984 onwards, plus 4-stroke F4 models from 1999–2008.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFor Mariner Engines:\u003c\/b\u003e Compatibility is limited to specific 4A and 5C models using serial numbers beginning with 6E0 or 6E3. Verify your engine's serial before ordering.\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\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\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e4MLHU, 4MLHU2, 4MSHU, 4MSHU2\u003c\/td\u003e\n        \u003ctd\u003e4\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1996\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\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e5MLHU, 5MLHU2, 5MSHU, 5MSHU2\u003c\/td\u003e\n        \u003ctd\u003e5\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1996\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\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n\t  \u003ctr\u003e\n\t\t\u003ctd\u003eMariner\u003c\/td\u003e\n\t\t\u003ctd\u003e4A(6E0)\u003c\/td\u003e\n\t\t\u003ctd\u003e4\u003c\/td\u003e\n\t\t\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\t\t\u003ctd\u003e\u003c\/td\u003e\n\t\t\u003ctd\u003eModels with Serial Number 6E0\u003c\/td\u003e\n\t  \u003c\/tr\u003e\n\t  \u003ctr\u003e\n\t\t\u003ctd\u003eMariner\u003c\/td\u003e\n\t\t\u003ctd\u003e5C(6E3)\u003c\/td\u003e\n\t\t\u003ctd\u003e5\u003c\/td\u003e\n\t\t\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\t\t\u003ctd\u003e\u003c\/td\u003e\n\t\t\u003ctd\u003eModels with Serial Number 6E3\u003c\/td\u003e\n\t  \u003c\/tr\u003e\n\t  \u003ctr\u003e\n\t\t\u003ctd\u003eMariner\u003c\/td\u003e\n\t\t\u003ctd\u003e96325T, 96325M\u003c\/td\u003e\n\t\t\u003ctd\u003e4, 5\u003c\/td\u003e\n\t\t\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\t\t\u003ctd\u003e\u003c\/td\u003e\n\t\t\u003ctd\u003eOnly with Serial Number 6E0 \u0026amp; 6E3\u003c\/td\u003e\n\t  \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 Repair Kit\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect replacement\u003c\/dd\u003e\n  \u003cdt\u003eMaterials\u003c\/dt\u003e\n\u003cdd\u003eNeoprene rubber impeller, stainless steel plates\u003c\/dd\u003e\n  \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003e152 × 102 × 51 mm (6 × 4 × 2 inches)\u003c\/dd\u003e\n  \u003cdt\u003eWeight\u003c\/dt\u003e\n\u003cdd\u003e0.18 kg (0.4 lb)\u003c\/dd\u003e\n  \u003cdt\u003eDesign\u003c\/dt\u003e\n\u003cdd\u003eHigh-quality materials designed to OEM specifications\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 Housing (6E0-44311-00-00)\u003c\/li\u003e\n  \u003cli\u003e1 x Water Pump Gasket (6E0-44315-A0-00)\u003c\/li\u003e\n  \u003cli\u003e1 x Cartridge Insert (6E0-44322-02-00)\u003c\/li\u003e\n  \u003cli\u003e1 x Cartridge Outer Plate (6E0-44323-00-00)\u003c\/li\u003e\n  \u003cli\u003e1 x Impeller (6E0-44352-00-00)\u003c\/li\u003e\n  \u003cli\u003e1 x Water Seal Damper 2 (6E0-44366-00-00)\u003c\/li\u003e\n  \u003cli\u003e1 x Dowel Pin (93604-09066-00)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e4 x\u003c\/span\u003e Bolt (97080-06045-00\/97095-06045-00)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDisconnect the negative battery cable and remove the engine cover.\u003c\/li\u003e\n  \u003cli\u003eShift the outboard into neutral and remove the lower unit mounting bolts.\u003c\/li\u003e\n  \u003cli\u003eCarefully lower and separate the gearcase from the upper driveshaft housing.\u003c\/li\u003e\n  \u003cli\u003eLocate and unbolt the water pump housing, noting the orientation of the old parts.\u003c\/li\u003e\n  \u003cli\u003eRemove the old impeller, gaskets, and wear plates. Clean all mating surfaces thoroughly.\u003c\/li\u003e\n  \u003cli\u003eInstall the new gasket, wear plate, and cartridge insert from the kit.\u003c\/li\u003e\n  \u003cli\u003eSlide the new impeller onto the driveshaft, rotating it clockwise to seat the vanes correctly.\u003c\/li\u003e\n  \u003cli\u003eInstall the new housing and torque the bolts to the manufacturer's specification.\u003c\/li\u003e\n  \u003cli\u003eReassemble the lower unit to the engine, ensuring the driveshaft and water tube align.\u003c\/li\u003e\n  \u003cli\u003eReconnect the battery and test operation in a safe water environment, confirming a strong water stream.\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 this kit fits my specific engine?\u003c\/summary\u003e\n  \u003cp\u003eFirst, check the compatibility table. If your engine’s brand, model, HP, and year range are listed, it should fit. For absolute certainty, cross-reference your existing part number with those in the 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\u003eThe most common signs are a weak or non-existent water stream from the tell-tale port, frequent engine overheating alarms, and in severe cases, steam from the exhaust. Reduced engine performance can also indicate a cooling problem.\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\u003eAs a preventative maintenance measure, we recommend replacing the impeller every one to two 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\u003eWhat is the difference between this kit and an OEM one?\u003c\/summary\u003e\n  \u003cp\u003eThis is an aftermarket replacement part, not an OEM component. It is designed to meet or exceed original equipment manufacturer (OEM) specifications for fit, form, and function, offering a high-quality, cost-effective alternative.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow fast is shipping and what does it cost?\u003c\/summary\u003e\n  \u003cp\u003eWe ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free on most orders, with expedited options available at checkout for an additional fee.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat warranty and return policy applies?\u003c\/summary\u003e\n  \u003cp\u003eThis product is covered by a 1-year warranty against manufacturing defects under normal use. If you encounter an issue, contact support with your order details. Returns are accepted within our standard window for unused items in their original condition. Please see our full policy page or contact us 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 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":50723969204539,"sku":"GH-17KY004","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/GH-17KY004.png?v=1763038752","url":"https:\/\/seasierra.com\/products\/water-pump-impeller-repair-kit-fits-yamaha-4hp-5hp-outboard-replaces-6e0-w0078-a2-00","provider":"SeaSierra","version":"1.0","type":"link"}