Sierra replacement thermostat housing for Mercruiser Sterndrives. Sierra engine parts are manufactured to meet or exceed OEM requirements.
Fits: MCM/MIE GM V-6 & V-8 (305, 350, 454 & 502 CID) engines w/closed cooling systems
Interchangeable with:
Special Order item.
California Residents: 
WARNING
Cancer and Reproductive Harm -
P65Warnings.ca.gov
Mercruiser 160 Degree Thermostat Kit by Sierra Kit Includes: Sie-18-3649 Thermostat Sie-18-2844 Thermostat Cover Gasket Sie-18-2552 Thermostat Cover Gasket Sie-18-2553 Thermostat Cover...
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Sierra 18-3599-2 Water Circulating Pump for Mercruiser, Volvo Sierra high-quality engine parts are designed to meet OEM specifications. Fits Both Standard and Counter Rotating Engines. Fits GM...
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Sierra 18-3555 Mercruiser 160 Degree Thermostat Sierra replacement thermostat for Mercruiser Stern Drives Temperature Rating: 160°F Fits 1998 & newer GM V-6 & V-8 engines with closed...
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Sierra 18-3668 Thermostat Kit for Mercruiser Stern Drives For Mercruiser engines using 142 degree thermostats Fits 1983 & newer GM V-6 & V-8 engines with standard...
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Sierra 18-3551 142 Degree Thermostat for Mercruiser, Crusader,PCM When needing to replace your thermostat, we recommend Sierra high-quality engine parts as they are designed to meet OEM...
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Sierra 18-1953-2 Mercruiser V8 Exhaust Manifold Sierra exhaust manifolds are designed as OEM replacements and meet or exceed manufacturer’s requirements. Sierra replacement manifolds are fully...
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Sierra 18-3650 Mercruiser 140 Degree Thermostat Kit For Mercruiser Sterndrive engines using 140 degree thermostat. Fits 1998 & older MCM GM In-Line 4 & 6 cylinder engines. Kit...
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