{"product_id":"388702-water-pump-impeller-for-johnson-evinrude","title":"388702 Water Pump Impeller for Johnson Evinrude | JLM Marine","description":"\u003ch2\u003eWater Pump Impeller 388702 for Johnson Evinrude Outboard Motors – 20-35 HP\u003c\/h2\u003e\n\n\u003cp\u003eThis high-performance water pump impeller is designed as a direct replacement for \u003cstrong\u003eJohnson and Evinrude 2-stroke outboard motors\u003c\/strong\u003e ranging from \u003cstrong\u003e20 HP to 35 HP\u003c\/strong\u003e. Engineered with marine-grade \u003cstrong\u003eneoprene rubber and brass insert\u003c\/strong\u003e, it delivers reliable cooling performance across a wide range of applications from 1978 and newer models.\u003c\/p\u003e\n\n\u003cp\u003eThis impeller directly replaces OEM part numbers \u003cstrong\u003e388702, 47-89982, 47-65958, 395289, and 395265\u003c\/strong\u003e, as well as aftermarket equivalents including \u003cstrong\u003eSierra 18-3051 and CEF 500370\u003c\/strong\u003e, ensuring broad compatibility and easy sourcing.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e6-blade neoprene impeller\u003c\/strong\u003e with brass insert for durability and corrosion resistance\u003c\/li\u003e\n  \u003cli\u003eFits multiple horsepower ratings across decades of Johnson Evinrude 2-stroke engines\u003c\/li\u003e\n  \u003cli\u003ePrecision-engineered dimensions for direct OEM replacement fitment\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse:collapse; width:100%;\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eBrand\u003c\/th\u003e\n      \u003cth\u003ePart Number\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 (OEM)\u003c\/td\u003e\n      \u003ctd\u003e388702\u003c\/td\u003e\n      \u003ctd\u003ePrimary OEM number\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eJohnson \/ Evinrude (OEM)\u003c\/td\u003e\n      \u003ctd\u003e47-89982\u003c\/td\u003e\n      \u003ctd\u003eOEM alternate\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eJohnson \/ Evinrude (OEM)\u003c\/td\u003e\n      \u003ctd\u003e47-65958\u003c\/td\u003e\n      \u003ctd\u003eOEM alternate\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eJohnson \/ Evinrude (OEM)\u003c\/td\u003e\n      \u003ctd\u003e395289\u003c\/td\u003e\n      \u003ctd\u003eOEM alternate\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eJohnson \/ Evinrude (OEM)\u003c\/td\u003e\n      \u003ctd\u003e395265\u003c\/td\u003e\n      \u003ctd\u003eOEM alternate\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eSierra\u003c\/td\u003e\n      \u003ctd\u003e18-3051\u003c\/td\u003e\n      \u003ctd\u003eAftermarket equivalent\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCEF\u003c\/td\u003e\n      \u003ctd\u003e500370\u003c\/td\u003e\n      \u003ctd\u003eAftermarket equivalent\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\n\u003cp\u003eConfirm your engine model\/year in the table below. For Johnson\/Evinrude owners, here's a guide to help you identify your engine's serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/johnson-serial-number-guide\" rel=\"nofollow noopener\" target=\"_blank\"\u003eJohnson\/Evinrude Serial Number Guide\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n  \u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse:collapse; width:100%;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eYears\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\u003e20 HP\u003c\/td\u003e\n        \u003ctd\u003e2 Stroke\u003c\/td\u003e\n        \u003ctd\u003e1982 \u0026amp; UP\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eJohnson Evinrude\u003c\/td\u003e\n        \u003ctd\u003e25 HP\u003c\/td\u003e\n        \u003ctd\u003e2 Stroke\u003c\/td\u003e\n        \u003ctd\u003e1979 \u0026amp; UP\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eJohnson Evinrude\u003c\/td\u003e\n        \u003ctd\u003e28 HP\u003c\/td\u003e\n        \u003ctd\u003e2 Stroke\u003c\/td\u003e\n        \u003ctd\u003e1978 \u0026amp; UP\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eJohnson Evinrude\u003c\/td\u003e\n        \u003ctd\u003e30 HP\u003c\/td\u003e\n        \u003ctd\u003e2 Stroke\u003c\/td\u003e\n        \u003ctd\u003e1984 \u0026amp; UP\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eJohnson Evinrude\u003c\/td\u003e\n        \u003ctd\u003e35 HP\u003c\/td\u003e\n        \u003ctd\u003e2 Stroke\u003c\/td\u003e\n        \u003ctd\u003e1978 \u0026amp; UP\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse:collapse; width:100%;\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e\u003cstrong\u003eValue\u003c\/strong\u003e\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMaterial\u003c\/td\u003e\n      \u003ctd\u003eNeoprene and Brass\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eNumber of Blades\u003c\/td\u003e\n      \u003ctd\u003e6\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eInternal \/ Insert \/ Hub \/ Shaft Size\u003c\/td\u003e\n      \u003ctd\u003e0.628 inch (16.00 mm)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eDepth \/ Height \/ Width \/ Thickness\u003c\/td\u003e\n      \u003ctd\u003e0.754 inch\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eOverall \/ Outer \/ External Diameter\u003c\/td\u003e\n      \u003ctd\u003e2.015 inch (51.00 mm)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eItem Weight\u003c\/td\u003e\n      \u003ctd\u003eApprox. 37 g\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\n\u003cp\u003eYour package includes:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e1 × Outboard Impeller\u003c\/strong\u003e\u003c\/span\u003e (Neoprene with brass insert)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n  \u003cli\u003eDisconnect the fuel line and remove the lower unit from the outboard motor according to your engine's service manual.\u003c\/li\u003e\n  \u003cli\u003eRemove the water pump housing cover and note the orientation of the old impeller before extraction.\u003c\/li\u003e\n  \u003cli\u003eCarefully extract the old impeller using impeller pullers or needle-nose pliers. Avoid damaging the pump housing.\u003c\/li\u003e\n  \u003cli\u003eClean the pump housing thoroughly, removing any debris, old gasket material, or corrosion.\u003c\/li\u003e\n  \u003cli\u003eLubricate the new impeller with water-resistant marine grease or glycerin to ease installation and prevent dry start damage.\u003c\/li\u003e\n  \u003cli\u003eInstall the new impeller with blades oriented in the correct rotation direction (consult your service manual for proper rotation).\u003c\/li\u003e\n  \u003cli\u003eEnsure the brass insert is properly seated on the drive shaft and the impeller is fully seated in the housing.\u003c\/li\u003e\n  \u003cli\u003eReplace the pump housing gasket with a new one and apply a thin layer of marine-grade sealant if recommended.\u003c\/li\u003e\n  \u003cli\u003eReinstall the water pump housing cover and torque bolts to manufacturer specifications.\u003c\/li\u003e\n  \u003cli\u003eReattach the lower unit to the engine, ensuring proper alignment and secure mounting.\u003c\/li\u003e\n  \u003cli\u003eReconnect the fuel line and test the cooling system by running the engine with a water supply (flush muffs or in-water test).\u003c\/li\u003e\n  \u003cli\u003eCheck for proper water discharge from the tell-tale indicator and verify no leaks around the pump housing.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm this impeller fits my Johnson or Evinrude engine?\u003c\/strong\u003e\u003cbr\u003e\nA: Cross-reference your engine's horsepower, model year, and stroke type with the compatibility table above. You can also verify by matching the OEM part number (388702, 395289, 47-89982, etc.) found in your engine's parts diagram or service manual.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace my water pump impeller?\u003c\/strong\u003e\u003cbr\u003e\nA: Most manufacturers recommend replacing the impeller every 2–3 years or every 200–300 hours of operation, whichever comes first. If you frequently operate in sandy or debris-filled water, inspect and replace more often.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs that my impeller is failing?\u003c\/strong\u003e\u003cbr\u003e\nA: Common symptoms include weak or no water flow from the tell-tale indicator, engine overheating, steam from the engine, or reduced cooling performance. Inspect the impeller immediately if any of these occur.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I install this impeller myself or do I need a professional?\u003c\/strong\u003e\u003cbr\u003e\nA: If you have mechanical experience and the proper tools, installation is straightforward following the service manual. However, professional installation is recommended to ensure proper fitment, correct blade orientation, and to avoid damage to the pump housing.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is this an OEM or aftermarket impeller?\u003c\/strong\u003e\u003cbr\u003e\nA: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How fast do you ship and how much does it cost?\u003c\/strong\u003e\u003cbr\u003e\nA: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is your warranty and return policy?\u003c\/strong\u003e\u003cbr\u003e\nA: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused \u0026amp; in original condition); please see our policy page or reach out for instructions.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003eVerify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.\u003c\/li\u003e\n  \u003cli\u003eThis product is an aftermarket replacement part and is not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended to ensure safety and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuality Assured:\u003c\/strong\u003e As a trusted manufacturer for over 20 years, we supply top marine brands globally.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Shipping:\u003c\/strong\u003e Free delivery worldwide in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect from Manufacturer:\u003c\/strong\u003e Competitive pricing without compromising quality.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":50490253803833,"sku":"17IO002","price":16.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/Water_Pump_Impeller_for_Evinrude_Johnson_OMC_14-20-35_hp_0395289_-_JLM_MARINE-8290167.jpg?v=1755742019","url":"https:\/\/jlmmarine.com\/products\/388702-water-pump-impeller-for-johnson-evinrude","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}