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 head gaskets for Johnson, Evinrude and BRP outboard engines.

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

Sierra fuel fittings for Suzuki.

Sierra fuel fittings for Honda.

Sierra fuel fittings for Honda.

Sierra fuel fittings for Yamaha.

Sierra fuel fittings for Yamaha.

Sierra fuel fittings for Yamaha.

Sierra Nissan & Tohatsu fuel fittings.

Sierra replacement engine couplers for Mercruiser engines.

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

Sierra fuel water separators remove over 98.8% of emulsified water from gasoline. Sierra's 10 micron filters are over 90% efficient at removing particles as small as 10 micron. Ethanol blended fuel absorbs more water and loosens more particulants than regular fuels. All filters flow at 90 GPH. ONLY SUITABLE FOR ABOVE DECK APPLICATIONS. USCG requires a flame resistant metal bowl for below deck applications.