{"product_id":"mercury-thermostat-sleeve-23-47508t","title":"Mercury – Quicksilver Thermostat Retaining Sleeve | Cooling System Component | Brass | 47508T","description":"\u003cp data-start=\"0\" data-end=\"99\"\u003e\u003cstrong data-start=\"0\" data-end=\"97\"\u003eMercury – Quicksilver Thermostat Retaining Sleeve | Cooling System Component | Brass | 47508T\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=\"709\"\u003eIf your MerCruiser runs hot or the thermostat doesn’t seem to sit right, this little piece could be the missing link. The \u003cstrong data-start=\"247\" data-end=\"307\"\u003eMercury Marine 47508T Quicksilver Brass Retaining Sleeve\u003c\/strong\u003e holds the thermostat firmly in place inside the housing, keeping the cooling system sealed and working smoothly. It’s made from solid marine brass and built to handle years of use, heat, and vibration. Designed for \u003cstrong data-start=\"523\" data-end=\"555\"\u003eMerCruiser V6 and V8 engines\u003c\/strong\u003e with the older two-piece (#1 design) thermostat housing, it’s a simple part that helps keep your engine temperature steady and your boat running right.\u003c\/p\u003e\n\u003chr data-start=\"711\" data-end=\"714\"\u003e\n\u003ch3 data-start=\"716\" data-end=\"738\"\u003e\u003cstrong data-start=\"720\" data-end=\"736\"\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"741\" data-end=\"824\"\u003e\n\u003cstrong data-start=\"741\" data-end=\"753\"\u003ePurpose:\u003c\/strong\u003e Keeps the thermostat properly seated and aligned inside the housing.\u003c\/li\u003e\n\u003cli data-start=\"827\" data-end=\"907\"\u003e\n\u003cstrong data-start=\"827\" data-end=\"840\"\u003eMaterial:\u003c\/strong\u003e Machined from \u003cstrong data-start=\"855\" data-end=\"877\"\u003emarine-grade brass\u003c\/strong\u003e that won’t rust or corrode.\u003c\/li\u003e\n\u003cli data-start=\"910\" data-end=\"1009\"\u003e\n\u003cstrong data-start=\"910\" data-end=\"918\"\u003eFit:\u003c\/strong\u003e Designed for \u003cstrong data-start=\"932\" data-end=\"968\"\u003e#1 two-piece thermostat housings\u003c\/strong\u003e on early MerCruiser V6 and V8 engines.\u003c\/li\u003e\n\u003cli data-start=\"1012\" data-end=\"1092\"\u003e\n\u003cstrong data-start=\"1012\" data-end=\"1028\"\u003ePerformance:\u003c\/strong\u003e Prevents thermostat movement, leaks, and uneven coolant flow.\u003c\/li\u003e\n\u003cli data-start=\"1095\" data-end=\"1180\"\u003e\n\u003cstrong data-start=\"1095\" data-end=\"1110\"\u003eDurability:\u003c\/strong\u003e Handles constant heat, pressure, and vibration without wearing out.\u003c\/li\u003e\n\u003cli data-start=\"1183\" data-end=\"1271\"\u003e\n\u003cstrong data-start=\"1183\" data-end=\"1201\"\u003eCompatibility:\u003c\/strong\u003e Works with \u003cstrong data-start=\"1213\" data-end=\"1268\"\u003eMerCruiser sterndrive and inboard V6 and V8 engines\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1273\" data-end=\"1276\"\u003e\n\u003ch3 data-start=\"1278\" data-end=\"1315\"\u003e\u003cstrong data-start=\"1282\" data-end=\"1313\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"1318\" data-end=\"1368\"\u003eMerCruiser V6 (early 2-piece thermostat housing)\u003c\/li\u003e\n\u003cli data-start=\"1371\" data-end=\"1421\"\u003eMerCruiser V8 (early 2-piece thermostat housing)\u003c\/li\u003e\n\u003cli data-start=\"1424\" data-end=\"1488\"\u003eOlder high-horsepower MerCruiser inboard and sterndrive models\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1490\" data-end=\"1493\"\u003e\n\u003ch3 data-start=\"1495\" data-end=\"1538\"\u003e\u003cstrong data-start=\"1499\" data-end=\"1536\"\u003ePerformance \u0026amp; Real-World Benefits\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1539\" data-end=\"1866\"\u003eThe \u003cstrong data-start=\"1543\" data-end=\"1571\"\u003e47508T thermostat sleeve\u003c\/strong\u003e might be small, but it’s critical to how your cooling system works. It keeps the thermostat tight in its seat, which ensures coolant flows evenly through the system and keeps your engine at the right temperature. A loose or missing sleeve can cause leaks, uneven heating, or even overheating.\u003c\/p\u003e\n\u003cp data-start=\"1868\" data-end=\"2094\"\u003eThis brass sleeve won’t rust or deform, even after seasons of exposure to salt, water, and high heat. Once it’s installed, you can count on steady operation and a properly sealed thermostat every time you fire up the engine.\u003c\/p\u003e\n\u003chr data-start=\"2096\" data-end=\"2099\"\u003e\n\u003ch3 data-start=\"2101\" data-end=\"2133\"\u003e\u003cstrong data-start=\"2105\" data-end=\"2131\"\u003eWhy Choose Mercury OEM\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2134\" data-end=\"2380\"\u003eThe \u003cstrong data-start=\"2138\" data-end=\"2160\"\u003eQuicksilver 47508T\u003c\/strong\u003e is made by Mercury, so it’s cut and machined to fit perfectly inside your MerCruiser’s thermostat housing. Aftermarket sleeves might look the same but often don’t fit tightly or use the same corrosion-resistant brass.\u003c\/p\u003e\n\u003cp data-start=\"2382\" data-end=\"2598\"\u003eMercury parts are tested in real marine conditions — heat, saltwater, vibration, the works — so you know they’ll hold up. It’s one of those small, affordable parts that can save you from a much bigger repair later.\u003c\/p\u003e\n\u003chr data-start=\"2600\" data-end=\"2603\"\u003e\n\u003ch3 data-start=\"2605\" data-end=\"2618\"\u003e\u003cstrong data-start=\"2609\" data-end=\"2616\"\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2620\" data-end=\"2771\"\u003e\u003cstrong data-start=\"2620\" data-end=\"2663\"\u003eQ1: Which engines does this sleeve fit?\u003c\/strong\u003e\u003cbr data-start=\"2663\" data-end=\"2666\"\u003eIt’s made for \u003cstrong data-start=\"2680\" data-end=\"2712\"\u003eMerCruiser V6 and V8 engines\u003c\/strong\u003e with the early two-piece (#1 design) thermostat housing.\u003c\/p\u003e\n\u003cp data-start=\"2773\" data-end=\"2875\"\u003e\u003cstrong data-start=\"2773\" data-end=\"2799\"\u003eQ2: What’s it made of?\u003c\/strong\u003e\u003cbr data-start=\"2799\" data-end=\"2802\"\u003eIt’s made from \u003cstrong data-start=\"2817\" data-end=\"2832\"\u003esolid brass\u003c\/strong\u003e, so it won’t corrode or seize over time.\u003c\/p\u003e\n\u003cp data-start=\"2877\" data-end=\"3046\"\u003e\u003cstrong data-start=\"2877\" data-end=\"2900\"\u003eQ3: Why replace it?\u003c\/strong\u003e\u003cbr data-start=\"2900\" data-end=\"2903\"\u003eOver time, sleeves can wear or go missing, causing thermostat misalignment or leaks. A new one keeps the cooling system sealed and efficient.\u003c\/p\u003e\n\u003cp data-start=\"3048\" data-end=\"3165\"\u003e\u003cstrong data-start=\"3048\" data-end=\"3084\"\u003eQ4: Can it handle saltwater use?\u003c\/strong\u003e\u003cbr data-start=\"3084\" data-end=\"3087\"\u003eYes — brass is ideal for saltwater and won’t corrode like cheaper materials.\u003c\/p\u003e\n\u003cp data-start=\"3167\" data-end=\"3309\"\u003e\u003cstrong data-start=\"3167\" data-end=\"3183\"\u003eQ5: Why OEM?\u003c\/strong\u003e\u003cbr data-start=\"3183\" data-end=\"3186\"\u003eMercury’s OEM parts fit exactly right and last longer. You’ll spend less time fixing problems and more time on the water.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46941047882019,"sku":"23-47508T","price":14.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/47508t_main.jpg?v=1760631147","url":"https:\/\/partsvu.com\/en-ca\/products\/mercury-thermostat-sleeve-23-47508t","provider":"PartsVu","version":"1.0","type":"link"}