{"product_id":"tutor-auto-water-pump-kit-for-johnson-evinrude-20-35-hp-393630-replacement-impeller-kit-with-gaskets-hardware","title":"Tutor Auto Water Pump Kit for Johnson \u0026 Evinrude 20–35 HP — 393630 Replacement Impeller Kit with Gaskets \u0026 Hardware","description":"\u003cp\u003e\u003cstrong\u003eThe Tutor Auto 393630 water pump kit is a complete, direct-fit impeller replacement designed to restore cooling performance on Johnson and Evinrude 20–35 HP outboards.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eKeep your older outboard engine running reliably by replacing the failing impeller and related components before overheating or cooling loss occurs. This kit replaces common Johnson\/Evinrude part numbers (393630, 393509, 391636, 0393630) and Sierra 18-3382, and contains the neoprene impeller, housing parts, gaskets, seals, bolts and the small wrench needed to perform the job. It’s intended for a range of 20–35 HP Johnson and Evinrude models from the late 1970s through the early 2000s—check your engine’s model year and part references against the compatibility list to confirm fit.\u003c\/p\u003e\n\n\u003ch3\u003eWhich engines and years will this water pump kit fit?\u003c\/h3\u003e\n\u003cp\u003eThis Tutor Auto kit is formulated to replace factory water pumps on multiple Johnson and Evinrude 20–35 HP outboards across different production years. It covers specific 20, 25, 30 and 35 HP applications listed by OEM part cross-reference.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with Johnson\/Evinrude 20 HP (1985 and later where specified)\u003c\/li\u003e\n  \u003cli\u003eCovers Johnson\/Evinrude 25 HP (1985 and later) and 25 HP Commercial (1998–2001)\u003c\/li\u003e\n  \u003cli\u003eFits Johnson\/Evinrude 30 HP (various 1980–1983 models) and 35 HP (1980–1982)\u003c\/li\u003e\n  \u003cli\u003eReplaces OEM numbers 393630, 393509, 391636, 0393630 and Sierra 18-3382\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat components are included and why they matter?\u003c\/h3\u003e\n\u003cp\u003eThe kit supplies every internal wear part needed to rebuild the water pump chamber so you don’t need multiple orders or improvised fixes. Using all-new mating surfaces and seals restores the water pathway and reduces the risk of leaks.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eNeoprene impeller (395289) — flexible vanes for reliable water flow\u003c\/li\u003e\n  \u003cli\u003ePump housing (393632) and pump cup (328751) — replace worn casings\u003c\/li\u003e\n  \u003cli\u003eWear plate, gasket (325537), O-ring and seal — ensure a tight, leak-free fit\u003c\/li\u003e\n  \u003cli\u003eBolts and install wrench — hardware included for straightforward installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable and accurate is this replacement compared to OEM?\u003c\/h3\u003e\n\u003cp\u003eTutor Auto supplies a high-quality aftermarket kit manufactured to match OEM dimensions and function. While not an original OMC-branded part, materials and tolerances are selected to meet or exceed factory performance for longevity and proper fit.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eNeoprene impeller compound chosen for wear resistance and flexibility\u003c\/li\u003e\n  \u003cli\u003ePrecision-machined housings for correct clearances and pump performance\u003c\/li\u003e\n  \u003cli\u003eComplete gasket and seal set to prevent leaks and maintain pressure\u003c\/li\u003e\n  \u003cli\u003eDirect-fit design minimizes modification or additional parts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow difficult is installation and what should I prepare?\u003c\/h3\u003e\n\u003cp\u003eInstallation is a moderate DIY job for someone with basic mechanical skills and standard hand tools. The kit includes the install bolts and wrench, but you should have service manual guidance, a clean workspace, and common tools to complete the replacement correctly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAllow time to drain lower unit water and remove the old pump housing\u003c\/li\u003e\n  \u003cli\u003eFollow torque specs and sealant guidance from your engine manual\u003c\/li\u003e\n  \u003cli\u003eInspect driveshaft, bearings, and cooling passages while the pump is removed\u003c\/li\u003e\n  \u003cli\u003eTest for correct water flow at startup before launching\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Tutor Auto 393630 water pump kit is aimed at boat owners, marine mechanics, and DIYers who maintain older Johnson and Evinrude outboards in the 20–35 HP range and want a complete, value-minded pump rebuild set. It’s especially useful for seasonal maintenance, routine 100-hour service intervals, or when symptoms—low cooling flow, cavitation, or overheating—indicate the impeller and related components need replacement. Verify engine model and OEM part numbers before purchase to ensure compatibility.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this kit include everything needed for the water pump rebuild?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The kit includes impeller, pump housing, pump cup, wear plate, gasket, O-ring, seal, bolts and a wrench.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should I replace the impeller?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Inspect annually or every 100 hours; replace sooner if you notice reduced water flow or damaged vanes.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Tutor Auto","offers":[{"title":"Default Title","offer_id":48084620902558,"sku":"B08L74RS86","price":34.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/tutor-auto-front-packaging-393630-water-pump-kit.jpg?v=1785860986","url":"https:\/\/northtrailauto.ca\/products\/tutor-auto-water-pump-kit-for-johnson-evinrude-20-35-hp-393630-replacement-impeller-kit-with-gaskets-hardware","provider":"North Trail Auto","version":"1.0","type":"link"}