Sierra Gasoline Filters

When it comes to protecting marine engines from fuel contamination, Sierra has built a reputation for delivering aftermarket gasoline filters that match or exceed OEM performance standards. With a 58-year legacy in the marine industry, Sierra's fuel filtration systems are engineered specifically for the harsh marine environment where ethanol-blended fuels and moisture contamination pose constant challenges to engine performance and longevity.

Superior Water Separation Technology

Sierra fuel water separators remove over 99.8% of emulsified water from your gasoline, a critical capability given that modern ethanol-blended fuels absorb significantly more moisture than traditional gasoline. The company's gasoline filter lineup includes both 10 micron filters that are over 90% efficient at removing particles as small as 10 micron and 21 micron options, providing marine mechanics and boat owners with filtration solutions tailored to specific engine requirements. All filters flow at 90 GPH to feed even the hungriest motor, ensuring adequate fuel delivery even for high-performance applications.

Comprehensive Product Range

Sierra's gasoline filter catalog spans multiple filter configurations designed for direct OEM replacement across major marine engine brands including Mercury, MerCruiser, Yamaha, Honda, and Suzuki. Popular product lines include the 18-7944 and 18-7945 series for Mercury applications, the 18-7866 high-capacity filter for Yamaha engines, and specialized fuel water separator kits with precision-machined powder-coated aluminum brackets. The company offers filters in various sizes—from compact 3.875-inch short filters to 6-inch high-capacity models—allowing for easy retrofitting into existing fuel systems without modifications.

Built for Marine Durability

Sierra's 21 micron canister filters feature an epoxy-coated steel canister that prevents corrosion inside the canister from reaching your fuel system. These durable filters are pressure and leak tested to ABYC and USCG standards, ensuring they meet strict marine safety requirements. Backed by Sierra's industry-leading warranty, Sierra's aftermarket boat parts meet or exceed OEM standards, providing marine enthusiasts with confidence in both performance and reliability. Whether protecting fuel injection systems on modern outboards or carbureted inboard engines, Sierra gasoline filters deliver the multi-stage filtration necessary to keep engines running clean in saltwater and freshwater environments alike.