{"product_id":"mercury-water-pump-kit-46-42579a07","title":"Mercury – Water Pump Kit | Cooling System | 46-42579A07","description":"\u003cp data-start=\"0\" data-end=\"59\"\u003e\u003cstrong data-start=\"0\" data-end=\"59\"\u003eMercury – Water Pump Kit | Cooling System | 46-42579A07\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"61\" data-end=\"64\"\u003e\n\u003ch3 data-start=\"66\" data-end=\"80\"\u003eOverview\u003c\/h3\u003e\n\u003cp data-start=\"81\" data-end=\"542\"\u003eThis kit restores the heart of the cooling system—something you really notice after a few seasons of sand, silt, and shallow-water runs. When the impeller starts wearing down, the engine can run hotter than it should, especially during long idle periods or slow trolling. Swapping the whole kit gives the motor a fresh, steady flow of water again. It’s a job most boaters take on themselves, and this kit has what you need to get the pump back to full strength.\u003c\/p\u003e\n\u003chr data-start=\"544\" data-end=\"547\"\u003e\n\u003ch3 data-start=\"549\" data-end=\"567\"\u003eKey Features\u003c\/h3\u003e\n\u003cp data-start=\"568\" data-end=\"962\"\u003e  • \u003cstrong data-start=\"582\" data-end=\"608\"\u003eComplete Pump Assembly\u003c\/strong\u003e – Provides all core components needed for a full rebuild.\u003cbr data-start=\"666\" data-end=\"669\"\u003e  • \u003cstrong data-start=\"683\" data-end=\"708\"\u003eHigh-Quality Impeller\u003c\/strong\u003e – Delivers consistent water movement for stable engine temps.\u003cbr data-start=\"770\" data-end=\"773\"\u003e  • \u003cstrong data-start=\"787\" data-end=\"817\"\u003eDurable Housing Components\u003c\/strong\u003e – Holds up to sand, heat, and debris over repeated runs.\u003cbr data-start=\"874\" data-end=\"877\"\u003e  • \u003cstrong data-start=\"891\" data-end=\"909\"\u003eOEM-Spec Seals\u003c\/strong\u003e – Maintains proper sealing to prevent pressure loss.\u003c\/p\u003e\n\u003chr data-start=\"964\" data-end=\"967\"\u003e\n\u003ch3 data-start=\"969\" data-end=\"1002\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/h3\u003e\n\u003cp data-start=\"1003\" data-end=\"1189\"\u003e  • Mercury outboard cooling systems\u003cbr data-start=\"1049\" data-end=\"1052\"\u003e  • Multi-cylinder platforms\u003cbr data-start=\"1090\" data-end=\"1093\"\u003e  • Standard mechanical cooling layouts\u003cbr data-start=\"1142\" data-end=\"1145\"\u003e  • Classic Mercury service series\u003c\/p\u003e\n\u003chr data-start=\"1191\" data-end=\"1194\"\u003e\n\u003ch3 data-start=\"1196\" data-end=\"1234\"\u003ePerformance \u0026amp; Practical Benefits\u003c\/h3\u003e\n\u003cp data-start=\"1235\" data-end=\"1624\"\u003eA fresh pump usually brings the engine temps back to a more relaxed, predictable range. You’ll feel more confident running shallow water or long no-wake zones since the motor won’t drift toward overheating. Throttle transitions feel steadier because the cooling flow keeps the block from heat-soaking. Overall, it brings back that clean, dependable feel you expect from a healthy outboard.\u003c\/p\u003e\n\u003chr data-start=\"1626\" data-end=\"1629\"\u003e\n\u003ch3 data-start=\"1631\" data-end=\"1648\"\u003eWhy Buy OEM\u003c\/h3\u003e\n\u003cp data-start=\"1649\" data-end=\"1974\"\u003eOEM pump kits match Mercury’s clearances and flow design, which helps the motor hold stable temperature across all speeds. The materials resist swelling and wear better than budget parts, so the system stays consistent from one season to the next. It’s a straightforward way to avoid cooling problems that can sneak up later.\u003c\/p\u003e\n\u003chr data-start=\"1976\" data-end=\"1979\"\u003e\n\u003ch3 data-start=\"1981\" data-end=\"1990\"\u003eFAQ\u003c\/h3\u003e\n\u003cp data-start=\"1991\" data-end=\"2127\"\u003e\u003cstrong data-start=\"1991\" data-end=\"2044\"\u003e1. How can I tell the water pump is getting weak?\u003c\/strong\u003e\u003cbr data-start=\"2044\" data-end=\"2047\"\u003eReduced tell-tale flow, higher running temps, or steam at idle are common signs.\u003c\/p\u003e\n\u003cp data-start=\"2129\" data-end=\"2270\"\u003e\u003cstrong data-start=\"2129\" data-end=\"2188\"\u003e2. Do I need any calibration after installing this kit?\u003c\/strong\u003e\u003cbr data-start=\"2188\" data-end=\"2191\"\u003eNo, once the pump is rebuilt, the system operates normally without adjustments.\u003c\/p\u003e\n\u003cp data-start=\"2272\" data-end=\"2443\"\u003e\u003cstrong data-start=\"2272\" data-end=\"2325\"\u003e3. How does this kit handle sandy or silty water?\u003c\/strong\u003e\u003cbr data-start=\"2325\" data-end=\"2328\"\u003eThe impeller and housing materials are built for typical wear, but regular inspections help in gritty environments.\u003c\/p\u003e\n\u003cp data-start=\"2445\" data-end=\"2584\"\u003e\u003cstrong data-start=\"2445\" data-end=\"2474\"\u003e4. Any installation tips?\u003c\/strong\u003e\u003cbr data-start=\"2474\" data-end=\"2477\"\u003eTake note of the impeller’s vane direction and lightly lube the new one before sliding it into the housing.\u003c\/p\u003e\n\u003cp data-start=\"2586\" data-end=\"2714\"\u003e\u003cstrong data-start=\"2586\" data-end=\"2635\"\u003e5. What happens when the pump starts failing?\u003c\/strong\u003e\u003cbr data-start=\"2635\" data-end=\"2638\"\u003eThe engine may run hotter, lose water pressure, or show weak tell-tale flow.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46940117467427,"sku":"46-42579A07","price":158.82,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/PV458389_6.jpg?v=1698811419","url":"https:\/\/partsvu.com\/en-ca\/products\/mercury-water-pump-kit-46-42579a07","provider":"PartsVu","version":"1.0","type":"link"}