{"product_id":"3c8-65021-2-water-pump-impeller-for-nissan-tohatsu-40d-50d-jlm-marine","title":"3C8-65021-2 Water Pump Impeller for Nissan Tohatsu 40D 50D | JLM Marine","description":"\u003ch2\u003eWater Pump Impeller for Nissan Tohatsu 40D 50D – OEM 3C8-65021-2 Replacement\u003c\/h2\u003e\n\n\u003cp\u003eThis water pump impeller is designed for \u003cstrong\u003eNissan and Tohatsu 2-Stroke 40D and 50D outboard engines\u003c\/strong\u003e. Engineered to deliver reliable cooling performance, it ensures your engine operates at optimal temperatures during every outing.\u003c\/p\u003e\n\n\u003cp\u003eThis aftermarket impeller directly replaces OEM part numbers \u003cstrong\u003e3C8-65021-2\u003c\/strong\u003e, 3C8650212, and 3C8650212M, providing a cost-effective solution without compromising on quality or fitment.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eIncludes impeller with key\/pin for complete installation\u003c\/li\u003e\n  \u003cli\u003eConstructed from durable \u003cstrong\u003eneoprene with nylon hub\u003c\/strong\u003e for long-lasting performance\u003c\/li\u003e\n  \u003cli\u003e6-blade design 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 border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\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\u003eNissan \/ Tohatsu\u003c\/td\u003e\n      \u003ctd\u003e3C8-65021-2\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eNissan \/ Tohatsu\u003c\/td\u003e\n      \u003ctd\u003e3C8650212\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eNissan \/ Tohatsu\u003c\/td\u003e\n      \u003ctd\u003e3C8650212M\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.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n  \u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\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      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNissan \/ Tohatsu\u003c\/td\u003e\n        \u003ctd\u003eMD40A, MD40B, NSD40A, NSD40B, NSD40B2, M40D2, NS40D2, MFS40A, NSF40A\u003c\/td\u003e\n        \u003ctd\u003e40 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2002-2017\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNissan \/ Tohatsu\u003c\/td\u003e\n        \u003ctd\u003eMD50A, MD50B, MD50B2, NSD50A, NSD50B, NSD50B2, NS50D2, M50D2, NSF50A, MFS50A\u003c\/td\u003e\n        \u003ctd\u003e50 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2002-2017\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\"\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\u003eOEM Part Number\u003c\/td\u003e\n      \u003ctd\u003e3C8-65021-2\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\u003eOverall Diameter\u003c\/td\u003e\n      \u003ctd\u003e50.40 mm \/ 1.99 inch\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eShaft Diameter\u003c\/td\u003e\n      \u003ctd\u003e17.20 mm \/ 0.68 inch\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMaterial\u003c\/td\u003e\n      \u003ctd\u003eNeoprene with Nylon Hub\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eWeight\u003c\/td\u003e\n      \u003ctd\u003e20 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\u003eOutboard 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\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 by loosening the mounting bolts.\u003c\/li\u003e\n  \u003cli\u003eCarefully extract the old impeller from the pump housing, noting its orientation and blade direction.\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 pump grease or soapy water to ease installation.\u003c\/li\u003e\n  \u003cli\u003eInsert the key\/pin into the shaft slot, ensuring it is properly seated.\u003c\/li\u003e\n  \u003cli\u003eInstall the new impeller onto the shaft, aligning the blades in the correct rotation direction (refer to your service manual).\u003c\/li\u003e\n  \u003cli\u003eGently rotate the impeller to ensure all blades flex correctly and fit snugly inside the housing.\u003c\/li\u003e\n  \u003cli\u003eReplace the pump housing cover with a new gasket and tighten bolts evenly to the specified torque.\u003c\/li\u003e\n  \u003cli\u003eReinstall the lower unit onto the outboard motor, ensuring all connections are secure.\u003c\/li\u003e\n  \u003cli\u003eReconnect the fuel line and perform a water flow test by running the engine with the cooling system flushed.\u003c\/li\u003e\n  \u003cli\u003eInspect for proper water discharge from the tell-tale outlet and check for 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 Nissan or Tohatsu engine?\u003c\/strong\u003e\u003cbr\u003e\nA: Check the Compatible Engine Models table above for your specific model and year (2002-2017). Additionally, compare the impeller dimensions—6 blades, 50.40 mm diameter, 17.20 mm shaft—with your original part to ensure a perfect match.\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 notice overheating, reduced water flow from the tell-tale, or visible cracks\/damage on the impeller blades, replace it immediately.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs of a failing water pump impeller?\u003c\/strong\u003e\u003cbr\u003e\nA: Common symptoms include engine overheating, weak or no water discharge from the tell-tale outlet, steam from the engine, and reduced performance. Inspect the impeller regularly for cracked, worn, or missing blades.\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 proper tools, you can install it yourself by following the service manual. However, professional installation is recommended to ensure the cooling system operates correctly and to avoid potential engine damage.\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":51942482575673,"sku":"17IT007K","price":8.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/12_831a7e70-f507-4730-b78e-48e0bcea265e.jpg?v=1771172210","url":"https:\/\/jlmmarine.com\/products\/3c8-65021-2-water-pump-impeller-for-nissan-tohatsu-40d-50d-jlm-marine","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}