{"product_id":"sierra-marine-water-pump-kit-sie-18-3150","title":"Sierra Marine Water Pump Kit 18-3150 – Yamaha 20-25HP 2-Stroke Cooling System Rebuild","description":"\u003cp data-start=\"216\" data-end=\"468\"\u003eThe \u003cstrong data-start=\"220\" data-end=\"253\"\u003eSierra 18-3150 Water Pump Kit\u003c\/strong\u003e is a complete internal rebuild kit designed for Yamaha 2-stroke 20HP and 25HP outboards. This kit restores proper cooling system performance by replacing all critical wear components inside the water pump assembly.\u003c\/p\u003e\n\u003cp data-start=\"470\" data-end=\"711\"\u003eThis is a \u003cstrong data-start=\"480\" data-end=\"505\"\u003e“without housing” kit\u003c\/strong\u003e, meaning it includes the impeller, wear plate, cup, seals, and gaskets while reusing the existing pump housing. Ideal for routine maintenance or resolving weak water flow, overheating, or impeller failure.\u003c\/p\u003e\n\u003cp data-start=\"713\" data-end=\"856\"\u003eBuilt to meet or exceed OEM specifications, Sierra components ensure reliable cooling performance and long service life in marine environments.\u003c\/p\u003e\n\u003chr data-start=\"858\" data-end=\"861\"\u003e\n\u003ch2 data-start=\"863\" data-end=\"882\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"866\" data-end=\"882\"\u003eKey Features\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-start=\"883\" data-end=\"1226\"\u003e\n\u003cli data-start=\"883\" data-end=\"950\"\u003eComplete internal water pump rebuild kit (housing not included)\u003c\/li\u003e\n\u003cli data-start=\"951\" data-end=\"1019\"\u003eIncludes impeller, wear plate, cup, gaskets, seals, and hardware\u003c\/li\u003e\n\u003cli data-start=\"1020\" data-end=\"1089\"\u003eRestores proper cooling water flow and engine temperature control\u003c\/li\u003e\n\u003cli data-start=\"1090\" data-end=\"1136\"\u003eDirect OEM replacement fit and performance\u003c\/li\u003e\n\u003cli data-start=\"1137\" data-end=\"1189\"\u003eDesigned for Yamaha 2-stroke mid-range outboards\u003c\/li\u003e\n\u003cli data-start=\"1190\" data-end=\"1226\"\u003eSierra limited lifetime warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1228\" data-end=\"1231\"\u003e\n\u003ch2 data-start=\"1233\" data-end=\"1260\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1236\" data-end=\"1260\"\u003eEngine Compatibility\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3 data-start=\"1262\" data-end=\"1297\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1266\" data-end=\"1297\"\u003eYamaha Outboards (2-Stroke)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-start=\"1298\" data-end=\"1317\"\u003e\n\u003cli data-start=\"1298\" data-end=\"1307\"\u003e20 HP\u003c\/li\u003e\n\u003cli data-start=\"1308\" data-end=\"1317\"\u003e25 HP\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1319\" data-end=\"1392\"\u003e➡️ Fits \u003cstrong data-start=\"1327\" data-end=\"1365\"\u003e2-cylinder Yamaha 2-stroke engines\u003c\/strong\u003e with standard lower units.\u003c\/p\u003e\n\u003ch3 data-start=\"1394\" data-end=\"1431\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1398\" data-end=\"1431\"\u003eMariner (Yamaha-built models)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-start=\"1432\" data-end=\"1451\"\u003e\n\u003cli data-start=\"1432\" data-end=\"1441\"\u003e20 HP\u003c\/li\u003e\n\u003cli data-start=\"1442\" data-end=\"1451\"\u003e25 HP\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1453\" data-end=\"1538\"\u003e➡️ Cross-compatible with Yamaha-manufactured Mariner engines using the same platform.\u003c\/p\u003e\n\u003chr data-start=\"1540\" data-end=\"1543\"\u003e\n\u003ch2 data-start=\"1545\" data-end=\"1582\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1548\" data-end=\"1580\"\u003eSerial Number Fitment Notice\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp data-start=\"1583\" data-end=\"1641\"\u003eFitment varies by model year and lower unit configuration.\u003c\/p\u003e\n\u003cp data-start=\"1643\" data-end=\"1723\"\u003e⚠️ Always confirm compatibility using your engine serial number, especially for:\u003c\/p\u003e\n\u003cul data-start=\"1724\" data-end=\"1805\"\u003e\n\u003cli data-start=\"1724\" data-end=\"1759\"\u003eEarly vs late production models\u003c\/li\u003e\n\u003cli data-start=\"1760\" data-end=\"1805\"\u003eYamaha vs Yamaha-built Mariner variations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1807\" data-end=\"1810\"\u003e\n\u003ch2 data-start=\"1812\" data-end=\"1851\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1815\" data-end=\"1851\"\u003eWhen This Part Needs Replacement\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp data-start=\"1852\" data-end=\"1893\"\u003eReplace the water pump kit if you notice:\u003c\/p\u003e\n\u003cul data-start=\"1894\" data-end=\"2068\"\u003e\n\u003cli data-start=\"1894\" data-end=\"1924\"\u003eWeak or no telltale stream\u003c\/li\u003e\n\u003cli data-start=\"1925\" data-end=\"1947\"\u003eEngine overheating\u003c\/li\u003e\n\u003cli data-start=\"1948\" data-end=\"1975\"\u003eReduced cooling at idle\u003c\/li\u003e\n\u003cli data-start=\"1976\" data-end=\"2021\"\u003eImpeller cracking, swelling, or hardening\u003c\/li\u003e\n\u003cli data-start=\"2022\" data-end=\"2068\"\u003eEngine sitting unused for extended periods\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2070\" data-end=\"2131\"\u003eRecommended service interval: \u003cstrong data-start=\"2100\" data-end=\"2131\"\u003eevery 100 hours or annually\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"2133\" data-end=\"2136\"\u003e\n\u003ch2 data-start=\"2138\" data-end=\"2163\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"2141\" data-end=\"2163\"\u003eInstallation Notes\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-start=\"2164\" data-end=\"2428\"\u003e\n\u003cli data-start=\"2164\" data-end=\"2225\"\u003eHousing is \u003cstrong data-start=\"2177\" data-end=\"2193\"\u003enot included\u003c\/strong\u003e — inspect and replace if worn\u003c\/li\u003e\n\u003cli data-start=\"2226\" data-end=\"2276\"\u003eInstall impeller in correct rotation direction\u003c\/li\u003e\n\u003cli data-start=\"2277\" data-end=\"2320\"\u003eApply marine grease during installation\u003c\/li\u003e\n\u003cli data-start=\"2321\" data-end=\"2376\"\u003eReplace seals and key components to prevent failure\u003c\/li\u003e\n\u003cli data-start=\"2377\" data-end=\"2428\"\u003eEnsure proper gasket sealing and torque to spec\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2430\" data-end=\"2433\"\u003e\n\u003ch2 data-start=\"2435\" data-end=\"2477\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"2438\" data-end=\"2477\"\u003eAlternate \/ Superseded Part Numbers\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3 data-start=\"2479\" data-end=\"2507\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"2483\" data-end=\"2507\"\u003eOEM Cross References\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-start=\"2508\" data-end=\"2569\"\u003e\n\u003cli data-start=\"2508\" data-end=\"2569\"\u003eYamaha:\n\u003cul data-start=\"2522\" data-end=\"2569\"\u003e\n\u003cli data-start=\"2522\" data-end=\"2545\"\u003e\u003cstrong data-start=\"2524\" data-end=\"2543\"\u003e6L2-W0078-00-00\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-start=\"2548\" data-end=\"2569\"\u003e\u003cstrong data-start=\"2550\" data-end=\"2569\"\u003e6L2-W0078-A1-00\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2571\" data-end=\"2574\"\u003e\n\u003ch3 data-start=\"2576\" data-end=\"2612\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"2580\" data-end=\"2612\"\u003eAftermarket Cross References\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-start=\"2613\" data-end=\"2654\"\u003e\n\u003cli data-start=\"2613\" data-end=\"2637\"\u003eMallory: \u003cstrong data-start=\"2624\" data-end=\"2635\"\u003e9-45606\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2638\" data-end=\"2654\"\u003eGLM: \u003cstrong data-start=\"2645\" data-end=\"2654\"\u003e12035\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2656\" data-end=\"2659\"\u003e\n\u003ch2 data-start=\"2661\" data-end=\"2678\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"2664\" data-end=\"2676\"\u003eShipping\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp data-start=\"2679\" data-end=\"2744\"\u003eShipping: Ships same or next day for fast Canada wide shipping. ⚓\u003c\/p\u003e\n\u003chr data-start=\"2746\" data-end=\"2749\"\u003e\n\u003ch3 data-start=\"2751\" data-end=\"2778\"\u003e💡 Parts Desk Insight\u003c\/h3\u003e\n\u003cp data-start=\"2779\" data-end=\"2867\"\u003eThis kit is commonly confused with smaller 9.9\/15HP kits — they are NOT interchangeable.\u003c\/p\u003e","brand":"WEST","offers":[{"title":"Default Title","offer_id":43564241092644,"sku":"SIE-18-3150","price":178.72,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/600e9220-ea96-49dc-a26c-f11bed7bfee7.png?v=1774160690","url":"https:\/\/marisolmarine.com\/products\/sierra-marine-water-pump-kit-sie-18-3150","provider":"Marisol Marine Company","version":"1.0","type":"link"}