Description
Sierra’s 18-7845 21 Micron Replacement Fuel Filter is designed to provide reliable fuel filtration for marine engine applications, helping protect fuel system components from contaminants commonly introduced by ethanol-blended fuels. It is engineered to maintain consistent fuel flow while delivering effective filtration to support dependable engine performance across a wide range of horsepower applications. All filters are designed to flow at 90 GPH, ensuring adequate fuel delivery even for high-demand engines. With a 4.35″ (110.5mm) long design and 11/16-16 thread pitch, this filter provides secure fitment and long-lasting service in demanding marine environments.
Features
- 21-micron filtration helps protect fuel system components from ethanol fuel contaminants
- Flows up to 90 GPH to support high horsepower engine fuel demands
- Long 4.35″ (110.5mm) design for extended filter capacity and service life
- 11/16-16 thread pitch for secure and reliable installation
- Designed for consistent fuel delivery and dependable marine engine performance
- Ethanol blended fuel absorbs more water and loosens more particulants than regular fuels
- Proper filtration is required for every horsepower engine
- All filters flow at 90 GPH to feed even the hungriest motor
- Premium Quality For Longer Life
- Meets or exceeds manufacturer’s recommended specifications
- Backed by Sierra’s limited lifetime warranty






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