{"product_id":"mercury-46-803750t05-outboard-water-pump-upper-housing","title":"Mercury – Water Pump Housing | OEM Replacement for 25 \u0026 30HP FourStroke Outboards | 803750T05","description":"\u003cp data-start=\"0\" data-end=\"99\"\u003e\u003cstrong data-start=\"0\" data-end=\"97\"\u003eMercury – Water Pump Housing | OEM Replacement for 25 \u0026amp; 30HP FourStroke Outboards | 803750T05\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"101\" data-end=\"104\"\u003e\n\u003ch3 data-start=\"106\" data-end=\"124\"\u003e\u003cstrong data-start=\"110\" data-end=\"122\"\u003eOverview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"125\" data-end=\"716\"\u003eIf your engine isn’t staying as cool as it used to, it might be time to replace the water pump housing — the heart of your cooling system. The \u003cstrong data-start=\"268\" data-end=\"315\"\u003eMercury Marine 803750T05 Water Pump Housing\u003c\/strong\u003e is built tough for \u003cstrong data-start=\"335\" data-end=\"373\"\u003e25HP and 30HP FourStroke outboards\u003c\/strong\u003e, giving you factory-quality performance and peace of mind. It’s made from durable, marine-grade materials that hold up to years of heat, vibration, and water exposure. When installed, it restores proper water flow and seals your system the way Mercury intended — no leaks, no guesswork, just reliable cooling every time you start the motor.\u003c\/p\u003e\n\u003chr data-start=\"718\" data-end=\"721\"\u003e\n\u003ch3 data-start=\"723\" data-end=\"745\"\u003e\u003cstrong data-start=\"727\" data-end=\"743\"\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"748\" data-end=\"834\"\u003e\n\u003cstrong data-start=\"748\" data-end=\"760\"\u003ePurpose:\u003c\/strong\u003e Replaces a worn or cracked housing to restore proper water circulation.\u003c\/li\u003e\n\u003cli data-start=\"837\" data-end=\"939\"\u003e\n\u003cstrong data-start=\"837\" data-end=\"854\"\u003eConstruction:\u003c\/strong\u003e Built from \u003cstrong data-start=\"866\" data-end=\"891\"\u003emarine-grade material\u003c\/strong\u003e tested for strength and corrosion resistance.\u003c\/li\u003e\n\u003cli data-start=\"942\" data-end=\"1033\"\u003e\n\u003cstrong data-start=\"942\" data-end=\"953\"\u003eDesign:\u003c\/strong\u003e OEM precision molding ensures a snug, watertight seal and dependable cooling.\u003c\/li\u003e\n\u003cli data-start=\"1036\" data-end=\"1121\"\u003e\n\u003cstrong data-start=\"1036\" data-end=\"1051\"\u003eDurability:\u003c\/strong\u003e Withstands high heat and pressure in both saltwater and freshwater.\u003c\/li\u003e\n\u003cli data-start=\"1124\" data-end=\"1214\"\u003e\n\u003cstrong data-start=\"1124\" data-end=\"1140\"\u003eEase of Use:\u003c\/strong\u003e Fits cleanly into place with no modifications — just bolt it on and go.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1216\" data-end=\"1219\"\u003e\n\u003ch3 data-start=\"1221\" data-end=\"1258\"\u003e\u003cstrong data-start=\"1225\" data-end=\"1256\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"1261\" data-end=\"1311\"\u003e\u003cstrong data-start=\"1261\" data-end=\"1309\"\u003eMercury 25HP carbureted FourStroke outboards\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-start=\"1314\" data-end=\"1377\"\u003e\u003cstrong data-start=\"1314\" data-end=\"1375\"\u003eMercury 3-cylinder 25HP and 30HP EFI FourStroke outboards\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1379\" data-end=\"1382\"\u003e\n\u003ch3 data-start=\"1384\" data-end=\"1427\"\u003e\u003cstrong data-start=\"1388\" data-end=\"1425\"\u003ePerformance \u0026amp; Real-World Benefits\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1428\" data-end=\"1741\"\u003eThe \u003cstrong data-start=\"1432\" data-end=\"1464\"\u003e803750T05 water pump housing\u003c\/strong\u003e keeps your cooling system working the way it should. When the old housing wears down, it can cause leaks or reduce water pressure — and that’s when overheating starts. This replacement part brings back the smooth water flow your engine depends on to stay cool and protected.\u003c\/p\u003e\n\u003cp data-start=\"1743\" data-end=\"1982\"\u003eIt’s made for the realities of boating life — long days on the water, salt exposure, and constant heat cycling. Once installed, it fits tight, seals properly, and keeps water moving efficiently so your outboard stays in its comfort zone.\u003c\/p\u003e\n\u003chr data-start=\"1984\" data-end=\"1987\"\u003e\n\u003ch3 data-start=\"1989\" data-end=\"2021\"\u003e\u003cstrong data-start=\"1993\" data-end=\"2019\"\u003eWhy Choose Mercury OEM\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2022\" data-end=\"2249\"\u003eThe \u003cstrong data-start=\"2026\" data-end=\"2047\"\u003eMercury 803750T05\u003c\/strong\u003e is a \u003cstrong data-start=\"2053\" data-end=\"2077\"\u003egenuine factory part\u003c\/strong\u003e, designed specifically for your outboard. Cheaper replacements might save a few dollars upfront but often use softer plastics that warp or crack under heat and pressure.\u003c\/p\u003e\n\u003cp data-start=\"2251\" data-end=\"2477\"\u003eMercury’s OEM housing is built from tougher material and tested to handle real marine conditions. It’s the same part Mercury technicians use in their service shops — proven to last and guaranteed to fit right the first time.\u003c\/p\u003e\n\u003chr data-start=\"2479\" data-end=\"2482\"\u003e\n\u003ch3 data-start=\"2484\" data-end=\"2497\"\u003e\u003cstrong data-start=\"2488\" data-end=\"2495\"\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2499\" data-end=\"2611\"\u003e\u003cstrong data-start=\"2499\" data-end=\"2535\"\u003eQ1: What does this part include?\u003c\/strong\u003e\u003cbr data-start=\"2535\" data-end=\"2538\"\u003eYou’ll receive the \u003cstrong data-start=\"2557\" data-end=\"2584\"\u003ewater pump housing only\u003c\/strong\u003e, ready for installation.\u003c\/p\u003e\n\u003cp data-start=\"2613\" data-end=\"2737\"\u003e\u003cstrong data-start=\"2613\" data-end=\"2645\"\u003eQ2: Why should I replace it?\u003c\/strong\u003e\u003cbr data-start=\"2645\" data-end=\"2648\"\u003eIf your housing is worn or damaged, it can lead to leaks, low pressure, or overheating.\u003c\/p\u003e\n\u003cp data-start=\"2739\" data-end=\"2886\"\u003e\u003cstrong data-start=\"2739\" data-end=\"2765\"\u003eQ3: How durable is it?\u003c\/strong\u003e\u003cbr data-start=\"2765\" data-end=\"2768\"\u003eIt’s made from \u003cstrong data-start=\"2783\" data-end=\"2830\"\u003ehigh-strength, corrosion-resistant material\u003c\/strong\u003e built for long-term use in harsh marine environments.\u003c\/p\u003e\n\u003cp data-start=\"2888\" data-end=\"2997\"\u003e\u003cstrong data-start=\"2888\" data-end=\"2918\"\u003eQ4: Is it easy to install?\u003c\/strong\u003e\u003cbr data-start=\"2918\" data-end=\"2921\"\u003eYes — it’s a \u003cstrong data-start=\"2934\" data-end=\"2952\"\u003edirect OEM fit\u003c\/strong\u003e that installs easily using standard tools.\u003c\/p\u003e\n\u003cp data-start=\"2999\" data-end=\"3172\"\u003e\u003cstrong data-start=\"2999\" data-end=\"3041\"\u003eQ5: Why go OEM instead of aftermarket?\u003c\/strong\u003e\u003cbr data-start=\"3041\" data-end=\"3044\"\u003eOEM parts are built to Mercury’s exact standards, meaning \u003cstrong data-start=\"3102\" data-end=\"3156\"\u003ebetter materials, better fit, and better longevity\u003c\/strong\u003e on the water.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46940113764643,"sku":"46-803750T05","price":71.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/80375T05_Main.jpg?v=1760631197","url":"https:\/\/partsvu.com\/en-au\/products\/mercury-46-803750t05-outboard-water-pump-upper-housing","provider":"PartsVu","version":"1.0","type":"link"}