When needing to replace your thermostat, we recommend Sierra high-quality engine parts as they are designed to meet OEM specifications at an economical price. The Sierra thermostats are designed for use on Ford 302/351 CID Engines, and used on all V-8 Chrysler engines with Rochester carburetors from 1986 to the present. Sierra thermostats are engineered for installation on water-cooled engines.
Interchangeable with:
California Residents: 
WARNING
Cancer and Reproductive Harm -
P65Warnings.ca.gov
Sierra 18-3649 Thermostat Sierra 18-3649 Thermostat is a replacement part for Mercruiser Stern Drives. All Sierra engine parts are manufactured to meet or exceed OEM requirements. Temperature...
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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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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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Thermostat 140 Degree, Mercury - Mercruiser 8M0089715 Replaces: GLM 13030 Mallory 9-43013 OMC 0508562, 0508566, 0508619, 0508717 Sierra 18-3551 Merc...
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Thermostat Housing Sleeve, Mercury - Mercruiser 23-806922 Fits most Mercruiser V8 & V6 Engines with the one piece thermostat housing
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Sierra 18-3648 Mercruiser 160 Degree Thermostat Kit Sierra high-quality engine parts are designed to meet OEM specifications. Temperature Rating: 160° Kit Contains: (1) 18-3649...
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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 18-3646 Mercruiser 140 Degree Thermostat Kit Sierra high-quality replacement engine parts are designed for OEM specifications. For 1982 & older Ford & GM V-8 engines with standard...
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Sierra 18-3651 Mercruiser 142 Degree Thermostat Kit Sierra high-quality engine parts are designed to meet OEM specifications. Temperature Rating: 142 degrees Kit Includes: (1) 18-2553...
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