{"title":"Kohler 4-Stroke 7.5HP Marine Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px; border:1px solid #e5e7eb; border-radius:8px;\"\u003e\n  \u003cp\u003e\n    This page is dedicated to Kohler 4‑Stroke 7.5HP outboard engines. Use it to find compatible parts and practical service information. Below you’ll find maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse our main Kohler collection, and at the bottom of this page you’ll find quick links to start browsing parts for this engine. On the collection page, use the “Filter \u0026amp; Sort” controls to narrow by horsepower, year range, and part category.\n  \u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/service-maintenance-kits\" style=\"display:inline-block; padding:10px 16px; background:#0ea5e9; color:#fff; text-decoration:none; border-radius:6px;\"\u003eBrowse All Kohler Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eHow to Identify Your 7.5HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eNameplate \/ serial plate: Look on the transom clamp bracket or swivel bracket for a label with model and serial information.\u003c\/li\u003e\n    \u003cli\u003eModel code details: The suffixes often indicate shaft length (S\/L\/XL), starting method (manual vs. electric), and control type (tiller vs. remote). Record the full code plus serial.\u003c\/li\u003e\n    \u003cli\u003e4‑Stroke indicators: Oil fill and dipstick on the powerhead, engine oil filter canister, and a dedicated crankcase breather indicate a 4‑stroke platform.\u003c\/li\u003e\n    \u003cli\u003eVisual cues: Note whether you have a tiller or remote\/console control, and measure shaft length (center of mounting bracket to cavitation plate) to verify parts like props and shift\/steering hardware.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eEngine Overview\u003c\/h2\u003e\n  \u003ch3\u003eSmall 4‑Stroke Platform (7–8 HP class)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eCompact 4‑stroke, typically 1–2 cylinders; carbureted or small‑EFI; water‑cooled with impeller pump.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e7–8 HP class 4‑stroke outboard variants (short\/long shaft, tiller or remote). Use your full model\/serial for exact part matching.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eLow fuel consumption, quiet operation, clean emissions, dependable trolling performance.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eConfirm shaft length, propeller diameter\/pitch, and control type before ordering. For cooling service, match impeller kit to your exact model and year.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"service-kits\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp style=\"max-width:900px;\"\u003eIntervals below are general guidelines for small 4‑stroke outboards; always follow your official service manual for your exact model and operating conditions.\u003c\/p\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; padding:8px; border-bottom:1px solid #e5e7eb;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left; padding:8px; border-bottom:1px solid #e5e7eb;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left; padding:8px; border-bottom:1px solid #e5e7eb;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left; padding:8px; border-bottom:1px solid #e5e7eb;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eEngine oil + filter\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e20 hours (initial), then every 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eUse marine‑rated 4‑stroke oil of the correct viscosity and a quality filter. Warm the engine first for a complete drain.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/oil-filters\"\u003eOil Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eGear oil (lower unit)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eEvery 100 hours or annually; inspect mid‑season\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eCheck for water intrusion or metal on the magnet; reseal the gearcase if contamination is present.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/lower-unit-seal-kits\"\u003eLower Unit Seal Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eInspect every 50 hours; replace 100–200 hours or as needed\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eVerify heat range and gap; replace if fouled, worn, or corroded.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/spark-plug\"\u003eSpark Plugs\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eFuel filter \/ water separator\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eInspect 50 hours; replace 100 hours or seasonally\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eUse fresh, ethanol‑managed fuel; replace clogged or water‑laden filters promptly.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eWater pump impeller \/ kit\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eEvery 2–3 seasons (or 200 hours), sooner in sandy\/weedy water\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eRestore cooling performance and protect against overheat by renewing impeller and wear items.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/water-pump-impeller-rebuild-kits\"\u003eWater Pump Impeller Rebuild Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eAnodes (sacrificial)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eInspect 50 hours; replace when 50% consumed\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eMatch alloy to water type (fresh\/brackish\/salt). Maintain clean, tight mounting for proper protection.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\"\u003eAnodes\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n  \u003cp style=\"font-size:12px; color:#6b7280;\"\u003e*Follow the service schedule in your specific manual if it differs from the guidelines above.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"common-parts\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service – \u003ca href=\"https:\/\/seasierra.com\/collections\/service-maintenance-kits\"\u003eService \u0026amp; Maintenance Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCooling System – \u003ca href=\"https:\/\/seasierra.com\/collections\/water-pumps\"\u003eWater Pumps\u003c\/a\u003e and \u003ca href=\"https:\/\/seasierra.com\/collections\/water-pump-impeller-rebuild-kits\"\u003eImpeller Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eFuel System – \u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e and \u003ca href=\"https:\/\/seasierra.com\/collections\/carburetor\"\u003eCarburetor Components\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eIgnition \/ Electrical – \u003ca href=\"https:\/\/seasierra.com\/collections\/spark-plug\"\u003eSpark Plugs\u003c\/a\u003e and \u003ca href=\"https:\/\/seasierra.com\/collections\/electrical-items\"\u003eElectrical Items\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003ePropulsion – \u003ca href=\"https:\/\/seasierra.com\/collections\/propellers\"\u003ePropellers\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCorrosion Protection – \u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\"\u003eAnodes\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eSeals \u0026amp; Hoses – \u003ca href=\"https:\/\/seasierra.com\/collections\/oil-seals\"\u003eOil Seals\u003c\/a\u003e and \u003ca href=\"https:\/\/seasierra.com\/collections\/hoses\"\u003eHoses\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eCommon Symptoms \u0026amp; Quick Checks\u003c\/h2\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; padding:8px; border-bottom:1px solid #e5e7eb;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left; padding:8px; border-bottom:1px solid #e5e7eb;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left; padding:8px; border-bottom:1px solid #e5e7eb;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eWeak tell‑tale stream \/ overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eInspect intake screens for debris; verify impeller condition; ensure water path isn’t blocked.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eWater pump impeller kit, intake screen, anodes\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003ePoor acceleration \/ power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eConfirm fresh fuel; replace fuel filter; check prop for damage; inspect\/replace spark plugs.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eFuel filter, spark plugs, propeller\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eHard starting \/ rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eDrain stale fuel; confirm choke\/enricher operation; clean idle circuit; replace plugs if fouled.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eSpark plugs, fuel filter, carburetor components\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eGearcase noise \/ metal in gear oil\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eCheck oil level\/condition; look for water intrusion; pressure‑test and reseal as needed.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eLower unit seal kit, gear oil, drain plug gaskets\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eExcess smoke (4‑stroke)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eConfirm oil level isn’t overfilled; check for fuel flooding; ensure proper warm‑up and plug health.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eEngine oil\/filter, spark plugs, carburetor components\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"faq\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails style=\"margin-bottom:8px;\"\u003e\n    \u003csummary\u003eAre parts interchangeable between different years or platforms?\u003c\/summary\u003e\n    \u003cp\u003eSome service parts are shared across multiple years, but many items (impeller kits, props, gaskets, electrical) are model‑ and year‑specific. Always verify with your full model code and serial number before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails style=\"margin-bottom:8px;\"\u003e\n    \u003csummary\u003eWhen should I replace the water pump impeller?\u003c\/summary\u003e\n    \u003cp\u003eAs a preventative measure every 2–3 seasons (about 200 hours), or sooner if you notice a weak tell‑tale, overheat alarms, or you operate in silty\/sandy water.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails style=\"margin-bottom:8px;\"\u003e\n    \u003csummary\u003eHow often should the lower unit gear oil be changed?\u003c\/summary\u003e\n    \u003cp\u003eTypically every 100 hours or annually. Inspect mid‑season for water intrusion or metallic debris and reseal the gearcase if contamination is found.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information do you need to confirm part compatibility?\u003c\/summary\u003e\n    \u003cp\u003eProvide the complete model code, serial number, shaft length (S\/L\/XL), control type (tiller or remote), and any relevant measurements (e.g., current prop size). Photos of the nameplate and existing parts help ensure a perfect match.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"padding:16px; border-top:1px solid #e5e7eb;\"\u003e\n  \u003cp\u003eReady to find parts for your Kohler 4‑Stroke 7.5HP? Browse our main collection to filter by horsepower, year, and category.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/service-maintenance-kits\" style=\"display:inline-block; padding:10px 16px; background:#0ea5e9; color:#fff; text-decoration:none; border-radius:6px;\"\u003eBrowse All Kohler Parts\u003c\/a\u003e\n  \u003cp style=\"margin-top:8px; color:#6b7280; font-size:12px;\"\u003eIf you’re unsure about your model, send us a photo of the nameplate and the part you need—we’ll help verify compatibility.\u003c\/p\u003e\n\u003c\/section\u003e","products":[{"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 4–7.3 HP (Replaces Kohler 359978)","description":"\u003csection\u003e\n\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 { padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top; }\n  table.ss-table th { white-space:nowrap; word-break:normal; letter-spacing:normal; font-weight:600; background:#f8fafc; }\n  @media (max-width:480px){ table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; } }\n\u003c\/style\u003e\n\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003ewater pump impeller kit\u003c\/strong\u003e is an aftermarket replacement for the seawater pump used on selected Kohler marine generators. Catalog information identifies the application as the Kohler GM28487 pump and lists Kohler 359978 as the replacement reference. The catalog describes the supplied service item as the impeller itself; no pump housing or complete water pump is included.\u003c\/p\u003e\n\u003cp\u003eUse the fitment information below to confirm that your generator model and pump match before ordering. Model names, horsepower ratings, and pump applications must be considered together.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFor selected Kohler marine generator models 4EF, 5E, 6EF, 7.3E, 4EFCD, 5ECD, 6EFCD, and 7.3ECD.\u003c\/li\u003e\n  \u003cli\u003eApplication: Kohler GM28487 seawater pump.\u003c\/li\u003e\n  \u003cli\u003eService replacement for a worn, cracked, brittle, or damaged impeller.\u003c\/li\u003e\n  \u003cli\u003eAftermarket replacement part; verify the original impeller and pump configuration before installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number References\u003c\/h2\u003e\n\u003cp\u003eThe following manufacturer reference is provided for identification and cross-checking only. It does not mean that the replacement is manufactured by Kohler.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number References\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003cth\u003eReference Type\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eKohler\u003c\/td\u003e\n\u003ctd\u003e359978\u003c\/td\u003e\n\u003ctd\u003eReplacement reference\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\u003eCatalog fitment identifies this impeller kit for the Kohler GM28487 pump on the following generator models. Confirm the pump identification and compare the original part before purchase.\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\u003ePump\u003c\/th\u003e\n\u003cth\u003eReplacement Reference\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\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003eGM28487\u003c\/td\u003e\n\u003ctd\u003e359978\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\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003eGM28487\u003c\/td\u003e\n\u003ctd\u003e359978\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\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003eGM28487\u003c\/td\u003e\n\u003ctd\u003e359978\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\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003eGM28487\u003c\/td\u003e\n\u003ctd\u003e359978\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\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003eGM28487\u003c\/td\u003e\n\u003ctd\u003e359978\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\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003eGM28487\u003c\/td\u003e\n\u003ctd\u003e359978\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\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003eGM28487\u003c\/td\u003e\n\u003ctd\u003e359978\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\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003eGM28487\u003c\/td\u003e\n\u003ctd\u003e359978\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e The catalog evidence reviewed for this product establishes Kohler GM28487 applications. Onan, Sherwood pump-model, and other generator fitments are not included here because they were not confirmed for this specific application.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n  \u003cdd\u003eWater pump impeller kit; impeller service replacement\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n  \u003cdd\u003eKohler GM28487 seawater pump\u003c\/dd\u003e\n  \u003cdt\u003eReplacement Reference\u003c\/dt\u003e\n  \u003cdd\u003eKohler 359978\u003c\/dd\u003e\n  \u003cdt\u003eFitment\u003c\/dt\u003e\n  \u003cdd\u003eSelected Kohler 4EF, 5E, 6EF, 7.3E, 4EFCD, 5ECD, 6EFCD, and 7.3ECD marine generators\u003c\/dd\u003e\n  \u003cdt\u003eConstruction\u003c\/dt\u003e\n  \u003cdd\u003eConfirm material, hub design, blade count, dimensions, and drive configuration against the original impeller before installation.\u003c\/dd\u003e\n  \u003cdt\u003eIncluded Pump Hardware\u003c\/dt\u003e\n  \u003cdd\u003eNo pump housing, cover plate, shaft, or complete pump assembly is included.\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 impeller\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe catalog identifies the replacement as an impeller-only service item. A gasket, O-ring, key, cover plate, or other installation hardware is not confirmed as included.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eShut down the generator, disconnect the power source, and close the appropriate seawater inlet or seacock.\u003c\/li\u003e\n  \u003cli\u003ePlace a suitable collection pan beneath the pump to catch residual water.\u003c\/li\u003e\n  \u003cli\u003eRemove the pump cover plate according to the generator or pump service instructions.\u003c\/li\u003e\n  \u003cli\u003eBefore removing the old impeller, note the direction in which its blades are bent.\u003c\/li\u003e\n  \u003cli\u003eRemove the old impeller using an appropriate impeller puller or suitable removal method. Avoid damaging the pump housing or shaft.\u003c\/li\u003e\n  \u003cli\u003eInspect the pump housing, cover plate, shaft, seal surfaces, and drive interface for wear or damage.\u003c\/li\u003e\n  \u003cli\u003eLubricate the new impeller with a lubricant approved for the pump manufacturer and impeller material. Do not run the pump dry.\u003c\/li\u003e\n  \u003cli\u003eInstall the impeller with the blades oriented in the same direction as the removed impeller and reinstall the cover plate using the correct sealing method for the pump.\u003c\/li\u003e\n  \u003cli\u003eOpen the seacock, restore power, start the generator, and immediately check seawater flow and the pump area for leaks.\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\u003eConfirm that your generator is one of the listed Kohler models and that it uses the GM28487 seawater pump. Also compare the old impeller, drive interface, and pump cover configuration before ordering. Horsepower alone is not sufficient to establish fitment.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are the signs of a worn impeller?\u003c\/summary\u003e\n  \u003cp\u003eCommon symptoms include reduced seawater flow, higher-than-normal operating temperature, an overheating alarm, or little to no water discharge. Inspect for cracked, hardened, distorted, or missing blades.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow often should the impeller be inspected?\u003c\/summary\u003e\n  \u003cp\u003eInspect the impeller during scheduled maintenance and whenever cooling-water flow decreases. Replacement timing depends on operating hours, storage conditions, water quality, and manufacturer recommendations. Saltwater exposure and extended periods without operation can accelerate deterioration.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this an OEM part?\u003c\/summary\u003e\n  \u003cp\u003eNo. This is an aftermarket replacement. The Kohler number shown on this page is a manufacturer reference used for identification and compatibility checking.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eDoes the package include an O-ring or gasket?\u003c\/summary\u003e\n  \u003cp\u003eNo additional seal or installation hardware is confirmed for this listing. The documented package is one impeller, so obtain any required gasket or O-ring separately if the pump service procedure calls for one.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify the generator model, pump number, original impeller, and drive configuration before purchase.\u003c\/li\u003e\n  \u003cli\u003eDo not operate the seawater pump dry; dry running can damage the impeller and pump.\u003c\/li\u003e\n  \u003cli\u003eInspect the pump housing and cover plate whenever the impeller is replaced.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket impeller replacement, not an OEM Kohler component.\u003c\/li\u003e\n  \u003cli\u003eFollow the generator and pump manufacturer’s service instructions. Professional installation is recommended when the correct procedure is uncertain.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMarine Replacement Parts\u003c\/strong\u003e — Replacement components for routine marine maintenance and repair.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication-Focused Listings\u003c\/strong\u003e — Product references and fitment information are provided to help you compare the original part and pump configuration.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGlobal Fulfillment\u003c\/strong\u003e — Shipping options and delivery estimates are shown during checkout based on destination and availability.\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\/collections\/kohler-4-stroke-7-5hp-marine-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}