
Sierra 18-3553 Mercury Thermostat The Sierra 18-3553 Thermostat has a 143°F temperature rating. For use on Mercury Marine engines. Interchangeable...
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Sierra 18-2721 Thermostat Cover Gasket
Sierra replacement thermostat cover gasket for Mercury Marine engines.
Interchangeable with:
California Residents:
WARNING
Cancer and Reproductive Harm -
P65Warnings.ca.gov