{"product_id":"indmar-ly6-thermostat-160f-drilled-986115d","title":"Indmar LY6 Thermostat 160°F Drilled – 986115D","description":"\u003cp data-start=\"120\" data-end=\"456\"\u003eThe Indmar Thermostat 986115D is a genuine OEM 160°F drilled thermostat designed for GM Gen IV LY6 and L96 marine engines equipped with closed cooling systems. This thermostat features a precision \u003cstrong data-start=\"317\" data-end=\"348\"\u003e5\/32” bypass (drilled) hole\u003c\/strong\u003e, allowing controlled coolant flow during warm-up to reduce thermal shock and improve temperature stability.\u003c\/p\u003e\n\u003cp data-start=\"458\" data-end=\"663\"\u003eEngineered specifically for Indmar applications, this thermostat ensures consistent operating temperature, optimized combustion efficiency, and proper coolant circulation through the heat exchanger system.\u003c\/p\u003e\n\u003chr data-start=\"665\" data-end=\"668\"\u003e\n\u003ch3 data-start=\"670\" data-end=\"686\"\u003eKey Features\u003c\/h3\u003e\n\u003cul data-start=\"687\" data-end=\"985\"\u003e\n\u003cli data-start=\"687\" data-end=\"720\"\u003eGenuine Indmar OEM thermostat\u003c\/li\u003e\n\u003cli data-start=\"721\" data-end=\"756\"\u003e\u003cstrong data-start=\"723\" data-end=\"754\"\u003e160°F operating temperature\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-start=\"757\" data-end=\"824\"\u003eIntegrated \u003cstrong data-start=\"770\" data-end=\"796\"\u003edrilled bypass (5\/32”)\u003c\/strong\u003e for improved coolant flow\u003c\/li\u003e\n\u003cli data-start=\"825\" data-end=\"884\"\u003eDesigned for closed cooling (freshwater cooled) systems\u003c\/li\u003e\n\u003cli data-start=\"885\" data-end=\"935\"\u003eMaintains stable engine temperature under load\u003c\/li\u003e\n\u003cli data-start=\"936\" data-end=\"985\"\u003eDirect replacement — no modification required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"987\" data-end=\"990\"\u003e\n\u003ch3 data-start=\"992\" data-end=\"1016\"\u003eEngine Compatibility\u003c\/h3\u003e\n\u003cp data-start=\"1017\" data-end=\"1065\"\u003eFits \u003cstrong data-start=\"1022\" data-end=\"1065\"\u003eIndmar GM Gen IV closed cooled engines:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1067\" data-end=\"1098\"\u003e\n\u003cli data-start=\"1067\" data-end=\"1082\"\u003eLY6 6.0L V8\u003c\/li\u003e\n\u003cli data-start=\"1083\" data-end=\"1098\"\u003eL96 6.0L V8\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1100\" data-end=\"1121\"\u003eApplications include:\u003c\/p\u003e\n\u003cul data-start=\"1122\" data-end=\"1248\"\u003e\n\u003cli data-start=\"1122\" data-end=\"1195\"\u003eMasterCraft, Malibu, Supra, Moomba, and other Indmar-powered inboards\u003c\/li\u003e\n\u003cli data-start=\"1196\" data-end=\"1248\"\u003eClosed cooling \/ heat exchanger equipped engines\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1250\" data-end=\"1346\"\u003e✔ Specifically for \u003cstrong data-start=\"1269\" data-end=\"1295\"\u003eclosed cooling systems\u003c\/strong\u003e\u003cbr data-start=\"1295\" data-end=\"1298\"\u003e✔ Not for raw water cooled thermostat housings\u003c\/p\u003e\n\u003cp data-start=\"1348\" data-end=\"1385\"\u003e \u003c\/p\u003e\n\u003chr data-start=\"1387\" data-end=\"1390\"\u003e\n\u003ch3 data-start=\"1392\" data-end=\"1424\"\u003eSerial Number Fitment Notice\u003c\/h3\u003e\n\u003cp data-start=\"1425\" data-end=\"1569\"\u003eFitment varies by engine configuration and model year. Always confirm using your engine serial number or engine model (LY6\/L96) before ordering.\u003c\/p\u003e\n\u003chr data-start=\"1571\" data-end=\"1574\"\u003e\n\u003ch3 data-start=\"1576\" data-end=\"1612\"\u003eWhen This Part Needs Replacement\u003c\/h3\u003e\n\u003cul data-start=\"1613\" data-end=\"1822\"\u003e\n\u003cli data-start=\"1613\" data-end=\"1654\"\u003eEngine running too hot or overheating\u003c\/li\u003e\n\u003cli data-start=\"1655\" data-end=\"1701\"\u003eEngine not reaching or holding temperature\u003c\/li\u003e\n\u003cli data-start=\"1702\" data-end=\"1741\"\u003eTemperature fluctuations under load\u003c\/li\u003e\n\u003cli data-start=\"1742\" data-end=\"1786\"\u003eThermostat sticking or corrosion present\u003c\/li\u003e\n\u003cli data-start=\"1787\" data-end=\"1822\"\u003eCooling system service interval\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1824\" data-end=\"1827\"\u003e\n\u003ch3 data-start=\"1829\" data-end=\"1851\"\u003eInstallation Notes\u003c\/h3\u003e\n\u003cul data-start=\"1852\" data-end=\"2123\"\u003e\n\u003cli data-start=\"1852\" data-end=\"1894\"\u003eInstall with spring side toward engine\u003c\/li\u003e\n\u003cli data-start=\"1895\" data-end=\"1966\"\u003eEnsure drilled bypass hole is oriented correctly (typically upward)\u003c\/li\u003e\n\u003cli data-start=\"1967\" data-end=\"2028\"\u003eReplace gasket\/seal during installation (sold separately)\u003c\/li\u003e\n\u003cli data-start=\"2029\" data-end=\"2076\"\u003eInspect heat exchanger and coolant passages\u003c\/li\u003e\n\u003cli data-start=\"2077\" data-end=\"2123\"\u003eVerify coolant condition before reassembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2125\" data-end=\"2128\"\u003e\n\u003ch3 data-start=\"2130\" data-end=\"2187\"\u003eAlternate \/ Superseded \/ Cross-Reference Part Numbers\u003c\/h3\u003e\n\u003cul data-start=\"2188\" data-end=\"2320\"\u003e\n\u003cli data-start=\"2188\" data-end=\"2211\"\u003eIndmar: \u003cstrong data-start=\"2198\" data-end=\"2209\"\u003e986115D\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2212\" data-end=\"2257\"\u003eRelated (non-drilled variant): \u003cstrong data-start=\"2245\" data-end=\"2255\"\u003e986115\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2258\" data-end=\"2320\"\u003eComparable applications: GM Gen IV 6.0L marine thermostats\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2322\" data-end=\"2325\"\u003e\n\u003ch3 data-start=\"2327\" data-end=\"2349\"\u003eParts Desk Insight\u003c\/h3\u003e\n\u003cp data-start=\"2350\" data-end=\"2710\"\u003eThe drilled bypass is the key difference on this thermostat. It allows a small amount of coolant to circulate before the thermostat fully opens, which helps prevent hot spots and improves temperature stability — especially important on closed cooling Indmar setups. Installing a non-drilled thermostat in these engines can lead to erratic temperature behavior.\u003c\/p\u003e\n\u003chr data-start=\"2712\" data-end=\"2715\"\u003e\n\u003ch3 data-start=\"2717\" data-end=\"2729\"\u003eShipping\u003c\/h3\u003e\n\u003cp data-start=\"2730\" data-end=\"2795\"\u003eShipping: Ships same or next day for fast Canada wide shipping. ⚓\u003c\/p\u003e","brand":"Indmar","offers":[{"title":"Default Title","offer_id":43563815764004,"sku":"986115D","price":58.22,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/986115D.png?v=1771568226","url":"https:\/\/marisolmarine.com\/products\/indmar-ly6-thermostat-160f-drilled-986115d","provider":"Marisol Marine Company","version":"1.0","type":"link"}