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.

Removes and installs driveshaft bearing retainer on MC-I, R-MR, Blackhawk, all Bravo and all Alpha drive units.

Miscellaneous Sierra cooling system parts for Mercury and Mariner outboard and Mercruiser engines.

Restores lost power and performance by cleaning clogged fuel injectors using proprietary polyether amine (PEA) detergent technology. Removes deposits that begin to form with every tank of gasoline. Saves gas by keeping fuel injectors clean. Made with highest quality premium PEA and FLA technologies to specifically address and treat the newer direct injection fuel systems in addition to traditional intake-port delivery systems. Provides total system clean-up and keep-clean, fuel lubricity additive, and fuel stabilizer. Increases power and performance, reduces emissions, improves fuel economy prevents rough idle, hesitation and stalling. Helps with cold start-up problems, prevents premature spark plug fouling, reduces deposit-related engine knocking and pinging, helps prevent injector misfire codes. For use with 18-8600 E-GO! Fuel Injector Cleaning Kit. See Shop & Service Equipment section for details.

Sierra seals inboard and inboard/outdrive engines.

Sierra fuel fittings for Honda.

Molded plastic oil drip tray to capture oil filter for seamless and clean removal. Exact OE specification to meet or exceed OE quality and fitment. For use on Mercury outboards with side placement oil filter. 25-60HP 4 Stroke.

Sierra fuel fittings for Honda.

Replaces Mercury #91-896661 for Optimax® and Verado® outboards that utilize a vapor separator with a top screw-in type filter.

Tests quality of fuel by measuring alcohol content. Replaces: Mercury 91-879172T28

Sierra fuel fittings for Suzuki.

Sierra lower unit seal kits for Mercury outboard engines.

Sierra carburetor kits and replacement parts Mercury outboards.

Sierra carburetor kits and replacement parts Mercury outboards.

Sierra carburetor kits and replacement parts Mercury outboards.