Blended with premium grade synthetic and mineral based stock combined with superior designed additives formulated for the extreme rigors of the marine environment. Features superior corrosion protection, advanced lubrication for reduction of wear to internal engine components and minimized piston ring deposits. Extensively tested for outstanding performance. Sold in case quantities only. Priced each.

Blended with premium grade synthetic and mineral based stock combined with superior designed additives formulated for the extreme rigors of the marine environment. Features superior corrosion protection, advanced lubrication for reduction of wear to internal engine components and minimized piston ring deposits. Extensively tested for outstanding performance. Sold in case quantities only. Priced each.

For use in supercharged Mercury Verado engines. Semi-synthetic formula for superior protection under high loads and operating stress. MNNA FC-W certified. Priced each, sold in case quantity only.

Blended with premium grade synthetic and mineral based stock combined with superior designed additives formulated for the extreme rigors of the marine environment. Features superior corrosion protection, advanced lubrication for reduction of wear to internal engine components and minimized piston ring deposits. Extensively tested for outstanding performance. Sold in case quantities only. Priced each.

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.

Specially designed to meet the unique requirements of modern 4-stroke recreational engines with or without catalyst systems. ZDDP anti-wear additive prevents phosphorus depletion to extend catalyst life and provide excellent anti-wear protection. Sierra Catalyst Compatible Oils provide leading wear protection and deposit control for engine longevity, corrosion protection from infrequent use and environmental contamination, enhanced detergent properties to prevent sludge formation, and reduced ending friction to maintain performance. Priced each, sold in case quantities only.

Blended with premium grade synthetic and mineral based stock combined with superior designed additives formulated for the extreme rigors of the marine environment. Features superior corrosion protection, advanced lubrication for reduction of wear to internal engine components and minimized piston ring deposits. Extensively tested for outstanding performance. Sold in case quantities only. Priced each.

A special blend of synthetic base oil and balanced additive system that exceeds the FC-W requirements for marine engine oil. Recommended for gasoline and diesel inboard and sterndrive engines. Provides superior engine protection during startups, operation and storage. Reduces friction and wear for extended engine life with longer lubrication effectiveness than mineral oils. Reduces oil consumption and improves fuel economy. Sold in case quantities only, priced each.

High performance lubricant designed to meet and exceed all Domestic and Import engine manufacturers' warranties. Exceeds JASO, ISO, API and NMMA for advanced generation 2 cycle lubricants. Protects engine against heat, friction and rust. Formulated specifically for BRP E-Tec and most other high performance 2-stroke marine engines. Priced each, sold in case quantities only.

Improves engine performance by removing gum, varnish, and carbon deposits from internal engine components. Thoroughly cleans intake ports, valves, combustion chambers, pistons, and frees sticky rings. Designed for regular maintenance of 2-cycle and 4- cycle marine engine. Not for use as a fogging oil. Priced each.

Improves engine performance and efficiency. Dissolves gum and varnish from entire fuel system - carbureted or injected. Removes internal carbon deposits from intake ports, valves, combustion chambers, pistons, and frees sticky rings. Displaces moisture and stabilizes fuel during storage periods. Designed for use in 2-cycle and 4-cycle marine engines. WHILE QUANTITIES LAST.

Formulated for Volvo Penta Hydraulic Steering and Power Trim Systems. Provides protection against rust and corrosion. Resists oxidation for longer life. Used for Power Steering Pumps and Trim Cylinders on Volvo Penta Marine Engines. Replaces Volvo Penta 3851039.

Specially designed to meet the unique requirements of modern 4-stroke recreational engines with or without catalyst systems. ZDDP anti-wear additive prevents phosphorus depletion to extend catalyst life and provide excellent anti-wear protection. Sierra Catalyst Compatible Oils provide leading wear protection and deposit control for engine longevity, corrosion protection from infrequent use and environmental contamination, enhanced detergent properties to prevent sludge formation, and reduced ending friction to maintain performance. Priced each, sold in case quantities only.

Premium quality motor oil formulated to meet or exceed warranty requirements for 4-stroke outboard engines. Specifically formulated to meet or exceed the tough requirements of the Marine 4-stroke motor manufacturers, Mercury, Yamaha, Johnson-Evinrude, Suzuki and Honda. Meets and exceeds quality performance API SJ, CF-2, CH-4. Protects engine against heat, friction and rust. Priced each, sold in case quantity only.

Specially designed to meet the unique requirements of modern 4-stroke recreational engines with or without catalyst systems. ZDDP anti-wear additive prevents phosphorus depletion to extend catalyst life and provide excellent anti-wear protection. Sierra Catalyst Compatible Oils provide leading wear protection and deposit control for engine longevity, corrosion protection from infrequent use and environmental contamination, enhanced detergent properties to prevent sludge formation, and reduced ending friction to maintain performance. Priced each, sold in case quantities only.