{"product_id":"sierra-18-3083-johnson-evinrude-impeller","title":"Sierra 3083 Johnson\/Evinrude Impeller","description":"\u003cp\u003eThe \u003cstrong\u003eSierra 3083 (18-3083) Impeller\u003c\/strong\u003e is a six-blade replacement water pump impeller for compatible Johnson, Evinrude, and OMC outboard engines. Installed inside the lower-unit water pump housing, it draws cooling water through the gearcase and circulates it through the engine. Replaces Johnson\/Evinrude OEM references 377230 and 777213. Included in Sierra water pump kits 18-3325 and 18-3376.\u003c\/p\u003e\u003ch2\u003eParts Desk Insight — Best Use\u003c\/h2\u003e\u003cp\u003eOlder Johnson and Evinrude engines frequently share the same horsepower rating while using completely different water pump assemblies. Matching this impeller to OEM number 377230 or 777213 from the engine parts diagram is far more reliable than relying on the horsepower decal alone. This impeller covers a wide vintage range (late 1950s–1978) across 35–55 HP applications, so confirming the full model number and production year is essential before ordering.\u003c\/p\u003e\u003cp\u003eReplace every 2–3 seasons or 200 hours regardless of visible wear. Impeller vanes harden and lose flexibility before showing obvious damage, reducing cooling flow without warning.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSierra part number: 18-3083\u003c\/li\u003e\n\u003cli\u003eSix flexible impeller blades\u003c\/li\u003e\n\u003cli\u003eFits compatible J\/E\/OMC 35–55 HP two-stroke outboards (late 1950s–1978)\u003c\/li\u003e\n\u003cli\u003eIncluded in Sierra water pump kits 18-3325 and 18-3376\u003c\/li\u003e\n\u003cli\u003eImpeller only — housing, wear plate, key, and seals not included\u003c\/li\u003e\n\u003cli\u003eUPC: 030999315359\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eEngine Compatibility\u003c\/h2\u003e\u003cp\u003eCommonly associated with compatible two-stroke Johnson and Evinrude outboards using OEM impeller 377230 or 777213:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e35 HP applications\u003c\/li\u003e\n\u003cli\u003e40 HP applications (approx. 1960–1970)\u003c\/li\u003e\n\u003cli\u003e50 HP applications (approx. 1971–1978)\u003c\/li\u003e\n\u003cli\u003e55 HP applications (approx. 1971–1978)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eAlways confirm by complete engine model number, production year, gearcase configuration, and OEM water pump diagram. Do not order by horsepower or approximate year alone.\u003c\/p\u003e\u003ch2\u003eAlternate Part Numbers\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSierra: 18-3083 \/ 118-3083\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude\/OMC: 377230, 0377230, 777213, 0777213\u003c\/li\u003e\n\u003cli\u003eRelated OEM reference: 777821\u003c\/li\u003e\n\u003cli\u003eGLM Marine: 89660\u003c\/li\u003e\n\u003cli\u003eMallory Marine: 9-45209, 9-45209-10\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eLower-unit removal is required to access the water pump assembly. During service: inspect the pump housing, wear plate, key, seals, and driveshaft; remove any broken impeller fragments from cooling passages; lubricate the new impeller with clean soapy water or approved assembly lubricant; rotate the driveshaft in its normal operating direction while seating the housing over the blades. Confirm strong cooling-water telltale flow before operating under load. Never operate the outboard without an adequate cooling-water supply.\u003c\/p\u003e\u003ch2\u003eRelated J\/E Impellers\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-18-3050-johnson-evinrude-impeller\"\u003eSierra 3050 (18-3050) Johnson\/Evinrude Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-18-3051-johnson-evinrude-impeller\"\u003eSierra 3051 (18-3051) Johnson\/Evinrude Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-18-3043-johnson-evinrude-impeller\"\u003eSierra 3043 (18-3043) Johnson\/Evinrude Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-18-3090-johnson-evinrude-impeller\"\u003eSierra 3090 (18-3090) Johnson\/Evinrude Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-3001-johnson-evinrude-impeller\"\u003eSierra 3001 Johnson\/Evinrude Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-3002-johnson-evinrude-impeller\"\u003eSierra 3002 Johnson\/Evinrude Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-3055-johnson-evinrude-impeller\"\u003eSierra 3055 Johnson\/Evinrude Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-3058-johnson-evinrude-impeller\"\u003eSierra 3058 Johnson\/Evinrude Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-3059-johnson-evinrude-impeller\"\u003eSierra 3059 Johnson\/Evinrude Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-31041-johnson-evinrude-impeller\"\u003eSierra 31041 Johnson\/Evinrude Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatible Water Pump Kits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-marine-water-pump-kit-18-3380-johnson-evinrude-40-75hp-cooling-system-rebuild\"\u003eSierra Marine Water Pump Kit 18-3380 – Johnson\/Evinrude 40–75HP\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-marine-water-pump-kit-18-3390-johnson-evinrude-85-300hp-v4-v6-cooling-system-rebuild\"\u003eSierra Marine Water Pump Kit 18-3390 – Johnson\/Evinrude 85–300HP V4\/V6\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cem\u003eAlways confirm fitment against your engine service manual and full model\/year before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51156142620708,"sku":"47-3083","price":53.09,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/7093b27e-5046-4f7c-8d2c-3a3ececac3d6.png?v=1785123373","url":"https:\/\/marisolmarine.com\/products\/sierra-18-3083-johnson-evinrude-impeller","provider":"Marisol Marine Company","version":"1.0","type":"link"}