{"product_id":"water-pump-impeller-kit-fits-kohler-marine-generators-4-8hp-replaces-kohler-359978-sherwood-8000k-sierra-23-3314","title":"Water Pump Impeller Kit – Fits Kohler Marine Generators 4-8HP (Replaces Kohler 359978, Sherwood 8000K, Sierra 23-3314)","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 Kit\u003c\/strong\u003e is a direct replacement component for Kohler Marine Generators in the 4–8 HP range (including 4EF, 5E, 6EF, 7.3E, and 8EFK series) that are factory-equipped with Sherwood G8000, G8001, or G8002 series pumps. It's engineered to restore cooling system performance and prevent engine overheating.\u003c\/p\u003e\n\u003cp\u003eIt serves as a direct interchange for several OEM and aftermarket part numbers, including Kohler 359978, Sherwood 8000K, Sierra 23-3314, and Onan 132-0415.\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003eDesigned for direct installation in Sherwood pump models G8001, G8001-1, G8002, G8002-1, G8005, and G8005-1.\u003c\/li\u003e\n    \u003cli\u003eThe impeller is made from durable neoprene rubber with a brass hub to resist corrosion in marine environments.\u003c\/li\u003e\n    \u003cli\u003eInstallation is straightforward; always lubricate the new impeller with glycerine or silicone grease before fitting.\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 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\u003eKohler\u003c\/td\u003e\n\u003ctd\u003e359978\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSherwood\u003c\/td\u003e\n\u003ctd\u003e8000K\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSherwood\u003c\/td\u003e\n\u003ctd\u003e08000K\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e23-3314\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eOnan\u003c\/td\u003e\n\u003ctd\u003e132-0415\u003c\/td\u003e\n\u003c\/tr\u003e\n       \u003ctr\u003e\n\u003ctd\u003eOnan\u003c\/td\u003e\n\u003ctd\u003e541-1524\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCEF\u003c\/td\u003e\n\u003ctd\u003e500190\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJMP\u003c\/td\u003e\n\u003ctd\u003e7013\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eDJ Pump\u003c\/td\u003e\n\u003ctd\u003e09-107-0601\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 in the table below.\u003c\/p\u003e\n\n\u003ch3\u003eKohler Marine Generators\u003c\/h3\u003e\n\u003cp\u003eCompatible with Kohler generator models that use the GM28487 sea water pump.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Kohler Marine Generator 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\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\u003eKohler\u003c\/td\u003e\n\u003ctd\u003e4EF\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e359978\u003c\/td\u003e\n\u003ctd\u003eUsed with GM28487 pump\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eKohler\u003c\/td\u003e\n\u003ctd\u003e4EFCD\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e359978\u003c\/td\u003e\n\u003ctd\u003eUsed with GM28487 pump\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eKohler\u003c\/td\u003e\n\u003ctd\u003e4EFKD\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e359978\u003c\/td\u003e\n\u003ctd\u003eUsed with GM28487 pump\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eKohler\u003c\/td\u003e\n\u003ctd\u003e5E\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e359978\u003c\/td\u003e\n\u003ctd\u003eUsed with GM28487 pump\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eKohler\u003c\/td\u003e\n\u003ctd\u003e5ECD\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e359978\u003c\/td\u003e\n\u003ctd\u003eUsed with GM28487 pump\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eKohler\u003c\/td\u003e\n\u003ctd\u003e5EKD\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e359978\u003c\/td\u003e\n\u003ctd\u003eUsed with GM28487 pump\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eKohler\u003c\/td\u003e\n\u003ctd\u003e6EF\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e359978\u003c\/td\u003e\n\u003ctd\u003eUsed with GM28487 pump\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eKohler\u003c\/td\u003e\n\u003ctd\u003e6EFCD\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e359978\u003c\/td\u003e\n\u003ctd\u003eUsed with GM28487 pump\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eKohler\u003c\/td\u003e\n\u003ctd\u003e6EFKD\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e359978\u003c\/td\u003e\n\u003ctd\u003eUsed with GM28487 pump\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eKohler\u003c\/td\u003e\n\u003ctd\u003e7.3E\u003c\/td\u003e\n\u003ctd\u003e7.3\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e359978\u003c\/td\u003e\n\u003ctd\u003eUsed with GM28487 pump\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eKohler\u003c\/td\u003e\n\u003ctd\u003e7.3ECD\u003c\/td\u003e\n\u003ctd\u003e7.3\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e359978\u003c\/td\u003e\n\u003ctd\u003eUsed with GM28487 pump\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eKohler\u003c\/td\u003e\n\u003ctd\u003e7.5\u003c\/td\u003e\n\u003ctd\u003e7.5\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e359978\u003c\/td\u003e\n\u003ctd\u003eUsed with GM28487 pump\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eKohler\u003c\/td\u003e\n\u003ctd\u003e8EFK\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e359978\u003c\/td\u003e\n\u003ctd\u003eUsed with GM28487 pump\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eOnan Marine Generators\u003c\/h3\u003e\n\u003cp\u003eFits select Onan generators using sea water pumps 132-0395 or 132-0430.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Onan Marine Generator Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\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\u003eOnan\u003c\/td\u003e\n\u003ctd\u003e4MDKBH\u003c\/td\u003e\n\u003ctd\u003e132-0415\u003c\/td\u003e\n\u003ctd\u003eUsed with pumps 132-0395 \u0026amp; 132-0430\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eOnan\u003c\/td\u003e\n\u003ctd\u003e5MDKBH\u003c\/td\u003e\n\u003ctd\u003e132-0415\u003c\/td\u003e\n\u003ctd\u003eUsed with pumps 132-0395 \u0026amp; 132-0430\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 for Sherwood pump models G8001, G8001-1, G8002, G8002-1, G8005, G8005-1\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eBrass hub with neoprene rubber impeller\u003c\/dd\u003e\n  \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003eImpeller diameter: 40mm (1-9\/16\"), Width\/depth: 19mm (3\/4\"), Shaft diameter: 12mm (7\/16\")\u003c\/dd\u003e\n  \u003cdt\u003eFitting Type\u003c\/dt\u003e\n\u003cdd\u003eSingle flat drive \/ D-slot\u003c\/dd\u003e\n  \u003cdt\u003eDrive Type\u003c\/dt\u003e\n\u003cdd\u003eD-slot 11mm (7\/16\")\u003c\/dd\u003e\n  \u003cdt\u003eNumber of Blades\u003c\/dt\u003e\n\u003cdd\u003e6\u003c\/dd\u003e\n  \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eImpeller is constructed with neoprene rubber and brass hub for seawater corrosion resistance\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 Impeller (Neoprene with Brass Hub)\u003c\/li\u003e\n    \u003cli\u003e1 x O-Ring (Nitrile 70)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n    \u003cli\u003eShut down the generator and disconnect the power source. Close the corresponding water inlet (seacock).\u003c\/li\u003e\n    \u003cli\u003ePlace a collection pan under the pump to catch any spilled coolant or water.\u003c\/li\u003e\n    \u003cli\u003eRemove the screws holding the pump cover plate. Carefully pry off the cover if it is stuck.\u003c\/li\u003e\n    \u003cli\u003eNote the rotational direction of the old impeller's blades before removing it. This helps ensure the new one is installed correctly.\u003c\/li\u003e\n    \u003cli\u003eGrip the hub of the old impeller with pliers and pull it straight out.\u003c\/li\u003e\n    \u003cli\u003eClean the interior of the pump housing and inspect for any scoring or damage.\u003c\/li\u003e\n    \u003cli\u003eLubricate the inside of the housing and the new impeller with a marine-safe lubricant like glycerine or silicone grease.\u003c\/li\u003e\n    \u003cli\u003eInsert the new impeller, making sure to bend the blades in the same direction as the old one.\u003c\/li\u003e\n    \u003cli\u003eInstall the new O-ring, ensuring it is seated correctly, and then reattach the cover plate.\u003c\/li\u003e\n    \u003cli\u003eOpen the seacock, reconnect power, and start the generator. Immediately check for proper water flow and inspect for leaks around the pump cover.\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 impeller will fit my generator?\u003c\/summary\u003e\n  \u003cp\u003eFirst, check the compatibility tables to see if your generator model is listed. This impeller fits specific Kohler and Onan models. Second, you can verify by checking the dimensions of your existing impeller; this part has a diameter of 40mm (1-9\/16\") and a width of 19mm (3\/4\").\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are the signs that my impeller has failed?\u003c\/summary\u003e\n  \u003cp\u003eThe most common signs of a failing or worn-out impeller are the engine running hotter than normal, a complete overheating alarm, or a noticeable reduction in water flow from the exhaust outlet. Upon visual inspection, you may find cracked, brittle, or missing blades.\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 one to two years, or every 200-300 hours of operation. Replacement intervals should be shorter in saltwater environments or if your generator is used infrequently.\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 \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 and 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\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\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723969564987,"sku":"ZP-E7KR-1AHK","price":16.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/ZP-E7KR-1AHK.png?v=1763038772","url":"https:\/\/seasierra.com\/products\/water-pump-impeller-kit-fits-kohler-marine-generators-4-8hp-replaces-kohler-359978-sherwood-8000k-sierra-23-3314","provider":"SeaSierra","version":"1.0","type":"link"}