Complete coverage on everything from basic maintenance to complete engine or drive overhaul. Featuring simple-to-follow, step-by-step, illustrated procedures, hundreds of exploded views, photographs, tables, wiring diagrams, specifications, and user friendly indexes. Newer manuals contain a skill level rating system for each procedure as well as special tool icons.

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.

Fits: OMC 50-60 HP 2-cylinder. Replaces: OMC. 384163, 387684, 389275, 585063, 586280. 9-tooth drive gear. Uses DV371* replacement drive gear, DVK71* 2-piece drive kit (fits current-model starters), SR371 repair kit. *NOTE: New OMC outboard starters use a 2-piece drive assembly while older OMC outboard starters use a 1-piece drive assembly. When ordering starter drives make certain you choose the correct drive because the new and old style OMC drive assemblies are not interchangeable!

Complete coverage on everything from basic maintenance to complete engine or drive overhaul. Featuring simple-to-follow, step-by-step, illustrated procedures, hundreds of exploded views, photographs, tables, wiring diagrams, specifications, and user friendly indexes. Newer manuals contain a skill level rating system for each procedure as well as special tool icons.

BRONZE 1.25 Tapped Inlet

Bosworth 1.25 Tapped Inlet Aluminum  

Bosworth 1.25 Tapped Outlet Bronze  

Bosworth 1.25 Tapped Outlet Aluminum  

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.

Fits: 40, 50, 60 HP 4 stroke 4 cylinder 0P094500 & Up and 50, 60 HP EFI 4 stroke 4 cylinder, 0P153500 & Up.

Complete coverage on everything from basic maintenance to complete engine or drive overhaul. Featuring simple-to-follow, step-by-step, illustrated procedures, hundreds of exploded views, photographs, tables, wiring diagrams, specifications, and user friendly indexes. Newer manuals contain a skill level rating system for each procedure as well as special tool icons.

Sierra relays for Yamaha.

Sierra timing belts provide extended durability and smooth performance characteristics. Features include Neoprene or Nitrile construction; positive slip proof engagement; fiberglass tension member; chemical and contaminent resistance; modified curvilinear tooth or trapezoidal tooth profile for direct OE fitment/replacement. Meets or exceeds OEM specs.

Sierra bypass cover gaskets.

Sierra replacement switch boxes.