{"product_id":"388702-water-pump-impeller-for-johnson-evinrude-20hp-25hp-28hp-30hp-35hp-jlm-marine","title":"388702 Water Pump Impeller for Johnson Evinrude 20HP 25HP 28HP 30HP 35HP | JLM Marine","description":"\u003ch2\u003eWater Pump Impeller 388702 – Fits Johnson\/Evinrude 20HP 25HP 28HP 30HP 35HP Outboard Motors\u003c\/h2\u003e\n\n\u003cp\u003eThis high-performance water pump impeller is engineered for \u003cstrong\u003eJohnson\/Evinrude 2-stroke outboard motors rated 20HP, 25HP, 28HP, 30HP, and 35HP\u003c\/strong\u003e. Designed to deliver reliable cooling performance, this impeller ensures proper water circulation through your engine's cooling system, protecting against overheating and extending motor life.\u003c\/p\u003e\n\n\u003cp\u003eThis aftermarket replacement impeller directly replaces OEM part numbers \u003cstrong\u003e388702\u003c\/strong\u003e, \u003cstrong\u003e395289\u003c\/strong\u003e, \u003cstrong\u003e395265\u003c\/strong\u003e, \u003cstrong\u003e47-89982\u003c\/strong\u003e, and \u003cstrong\u003e47-65958\u003c\/strong\u003e, providing a cost-effective alternative without compromising quality or performance.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eConstructed from \u003cstrong\u003escientifically engineered high-performance neoprene rubber\u003c\/strong\u003e for superior durability and marine corrosion resistance\u003c\/li\u003e\n\u003cli\u003eIncludes impeller with key\/pin for complete installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6-blade design\u003c\/strong\u003e optimized for efficient water flow and cooling\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\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\u003c\/td\u003e\n\u003ctd\u003e388702\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003e395289\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003e395265\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003e47-89982\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003e47-65958\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-3051\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCEF\u003c\/td\u003e\n\u003ctd\u003e500370\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 Serial Number Guide\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ctable\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\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003e20HP\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003e25HP\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003e28HP\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003e30HP\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003e35HP\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\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\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eHigh-performance neoprene rubber\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\u003eExternal Impeller Overall Diameter\u003c\/td\u003e\n\u003ctd\u003e51.00 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal Shaft Insert Diameter\u003c\/td\u003e\n\u003ctd\u003e16.00 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eItem Weight\u003c\/td\u003e\n\u003ctd\u003eApproximately 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\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e1 × Outboard Rubber Impeller with Key\/Pin\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisconnect the fuel line\u003c\/strong\u003e and remove the engine cowling to access the lower unit. Ensure the engine is off and cool before starting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove the water pump housing\u003c\/strong\u003e by unscrewing the mounting bolts that secure it to the lower unit gearcase.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtract the old impeller\u003c\/strong\u003e from the pump housing carefully, noting the direction of the blade curvature for proper installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInspect the pump housing and plate\u003c\/strong\u003e for cracks, corrosion, or wear. Replace any damaged components before continuing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLubricate the new impeller blades\u003c\/strong\u003e with a marine-grade water-resistant grease or glycerin to prevent tearing during installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall the key\/pin into the impeller shaft slot\u003c\/strong\u003e as indicated, ensuring it is seated properly to engage with the drive shaft.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert the new impeller into the housing\u003c\/strong\u003e with blades oriented in the correct rotation direction (typically curved in the direction of shaft rotation).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReinstall the pump housing onto the lower unit\u003c\/strong\u003e, aligning all bolt holes and gasket surfaces carefully.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTorque mounting bolts to manufacturer specifications\u003c\/strong\u003e in a crisscross pattern to ensure even sealing and prevent leaks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReattach the engine cowling\u003c\/strong\u003e and reconnect the fuel line securely.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRun the engine in a test tank or on muffs\u003c\/strong\u003e and confirm strong water flow from the telltale outlet. Monitor engine temperature during the first few minutes of operation.\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\/Evinrude engine?\u003c\/strong\u003e\u003cbr\u003e\nA: Cross-reference your engine's horsepower and model year with the compatibility table above. If your engine originally used OEM part numbers 388702, 395289, 395265, 47-89982, or 47-65958, this impeller is the correct replacement.\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 200–300 hours of operation, whichever comes first. If you operate in sandy, silty, or debris-heavy water, inspect and replace it more frequently.\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 telltale, engine overheating, steam from the engine, or reduced performance. Inspect the impeller immediately if you notice any of these signs.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I install this impeller myself or do I need a mechanic?\u003c\/strong\u003e\u003cbr\u003e\nA: If you have basic mechanical skills and the right tools, you can install this impeller yourself by following the installation guide. However, professional installation is recommended if you're unfamiliar with outboard motor servicing to ensure proper fit and function.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What's the difference between this aftermarket impeller and the OEM version?\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":51940927734073,"sku":"17IO002-K","price":10.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/519rGCSVSVL.jpg?v=1771121268","url":"https:\/\/jlmmarine.com\/products\/388702-water-pump-impeller-for-johnson-evinrude-20hp-25hp-28hp-30hp-35hp-jlm-marine","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}