Fits: 18-40HP

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 seals 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 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 replacement thermostats for Johnson, Evinrude, BRP, Chrysler and Force outboards.

Sierra replacement thermostats for Johnson, Evinrude, BRP, Chrysler and Force outboards.

Sierra replacement thermostats for Johnson, Evinrude, BRP, Chrysler and Force outboards.

Sierra replacement thermostats for Johnson, Evinrude, BRP, Chrysler and Force outboards.

Sierra replacement thermostats for Johnson, Evinrude, BRP, Chrysler and Force outboards.

Sierra replacement thermostats for Johnson, Evinrude, BRP, Chrysler and Force outboards.

Sierra replacement thermostats for Johnson, Evinrude, BRP, Chrysler and Force outboards.