Sierra 18-7784 Marine Fuel Filter Mallory 9-37821 MerCruiser 35-803897Q1 803897

Marine Fuel Filter for MerCruiser

This marine fuel filter for MerCruiser is a direct replacement that ensures clean fuel reaches the engine, matching OEM part numbers 35-803897Q1 and 803897, along with Mallory 9-37821 and Sierra 18-7784.

Overview

This marine fuel filter is designed for MerCruiser marine engines, delivering reliable fuel filtration to prevent debris from entering the carburetor or fuel injection system. It is a direct fit replacement that meets or exceeds original equipment specifications, making it a solid choice for boat owners and mechanics. The filter is built to withstand harsh marine environments, ensuring long service life.

Built For Performance

• High-capacity filter media traps contaminants and water from fuel
• Corrosion-resistant housing for saltwater and freshwater use
• Direct replacement design for easy installation
• Meets or exceeds OEM performance standards
• Compatible with standard marine fuel systems

On-The-Job Use

• Used in inboard and outboard boats with MerCruiser engines
• Common in freshwater and saltwater applications
• Replaces clogged filters during routine maintenance
• Essential for preventing fuel starvation and engine stalling

Specs At A Glance

Good To Know

Q: How often should I replace my marine fuel filter? A: Replace the fuel filter every 100 hours of operation or once a year, whichever comes first, to keep your engine running smoothly.

Q: Can I use this filter for both gasoline and diesel? A: This filter is specifically designed for gasoline marine engines. For diesel, you need a filter with a higher water separating capacity.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.