Sierra cover gaskets.

Sierra thermostat kits for Yamaha outboard engines.

Sierra Marine Engine Parts & Drive Parts   Sierra Marine is a trusted name in aftermarket replacement boat engine and drive parts. Sierra’s products are designed and engineered to exceed the high horsepower demands of today’s engines in the harshest marine environments. All Sierra products meet or exceed the original equipment part it replaces.   If you need help finding a part, we need, Make, Model, Year, Horsepower, and Serial number of your engine.   Warning: We can no longer ship engine parts International or to California Due to Prop 65.

Sierra water pump kits for Yamaha outboard engines.

Thermostat gaskets for Mercury

Sierra water jacket gaskets.

Sierra water jacket gaskets.

Sierra water pump kits for Yamaha outboard engines.

Sierra water pump kits for Yamaha outboards. Kit includes housing.

Sierra water pump kits for Yamaha outboard engines.

Sierra thermostat kits for Yamaha outboard engines.

Sierra water pump housings and bases for various outboard and inboard/outdrive engines.

Sierra head gaskets for Yamaha outboard engines.

Thermostat gaskets for Yamaha.

Miscellaneous Sierra cooling system parts for Yamaha outboard engines.