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 o-rings for Mercury and Mercruiser.

Sierra seals inboard and inboard/outdrive engines.

Sierra seals inboard and inboard/outdrive engines.

Sierra o-rings for Johnson, Evinrude and BRP outboards and OMC Sterndrive and Cobra engines.

Sierra powerhead base gaskets for Johnson, Evinrude and BRP outboard engines.

Sierra o-rings for various applications on outboard and inboard/outdrive engines.

Sierra o-rings for various applications on outboard and inboard/outdrive engines.

Sierra o-rings for various applications on outboard and inboard/outdrive engines.

Sierra exhaust manifold gaskets inboard, inboard/outdrive and sterndrive engines.

Sierra screws and washers for Johnson, Evinrude and OMC drive systems.

Sierra o-rings for Mercury and Mercruiser.

Sierra screws and washers for Johnson, Evinrude and OMC drive systems.

Sierra pivot pin end caps for Mercruiser.

Recommended for all general marine applications requiring a GL-5 class lubricant. 80W90. Ideal for replacing all old hypoid 90 applications needs. Formulated for use in freshwater or saltwater conditions and all standard marine applications under 75HP. Reduces friction and protects gears, bearings and other Gearcase components. Lower Unit Kit contains: two(2) 10 oz. tubes of Lower Unit Gear Lube and one(1) Flush & fill tool for small gearcases.