For use with 18-5953-1 alternator conversion kits installed on Mercruiser (Model 470) 3.7 liter aluminum block engines with serial number 6902288 and Up.

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 head gaskets for Johnson, Evinrude and BRP outboard engines.

Sierra replacement engine couplers for OMC Sterndrive, Cobra and Volvo engines.

Sierra replacement engine couplers for Mercruiser engines.

Sierra Mercury and Mariner clip style fuel fittings.

Sierra head gaskets for Johnson, Evinrude and BRP outboard engines.

Sierra head gaskets for Johnson, Evinrude and BRP outboard engines.

Resettable circuit breaker for internal electrical/ignition system.

Sierra head gaskets for Johnson, Evinrude and BRP outboard engines.

Sierra head gaskets for Johnson, Evinrude and BRP outboard engines.

Sierra powerhead gasket set for Johnson, Evinrude and BRP outboards.

Sierra vernatherm for Johnson, Evinrude and BRP outboard engines.

Sierra fuel pumps and replacement parts for Suzuki outboards.

Sierra head gaskets for Johnson, Evinrude and BRP outboard engines.