Sierra Marine Thermostat Cover Gasket Gaskets & Seals

Sierra Marine thermostat cover gaskets are replacement gaskets for marine engine cooling systems. They seal the joint between the thermostat cover and the thermostat housing. Each gasket is a direct-replacement thermostat housing gasket for outboard and stern drive engines, so the cooling system stays leak-free and the engine holds its operating temperature.

Key Features:

• Creates a leak-free seal between the thermostat cover and the thermostat housing
• Precision cut to match the mating surfaces of engine components, so it fits correctly the first time
• Built to meet or exceed OEM requirements
• Made to withstand harsh marine environments
• Many part numbers cross-reference to OEM, GLM, Mallory and other common marine part numbers
• Backed by Sierra's limited lifetime warranty

Sierra has supplied aftermarket marine components for decades, with more than 6,000 marine parts, tools and components in its catalog. Choose the part number that matches your engine and thermostat housing design.