Sierra 18-7721 In-Line Marine Fuel Filter for MPI EFI Engines

The Sierra 18-7721 In-Line Fuel Filter is designed specifically for MerCruiser MPI (Multi-Port Injection) and EFI (Electronic Fuel Injection) marine engines equipped with boost pumps. This stainless steel inline fuel filter provides reliable filtration to protect your engine's fuel system from contaminants and debris.

Key Features:

• 21 micron filtration removes harmful particles before they reach your engine
• Stainless steel construction for superior corrosion resistance in marine environments
• Female threaded inlet and outlet connections
• Designed for 3/8" ID fuel lines
• Includes replaceable filter element

Applications: Fits all MerCruiser MPI and EFI engines with boost pump, including 8.1L and 496 CID marine engines. Replaces Mercury part numbers 35-864572, 35-864572T, and 35-864572T01.

Sierra Marine parts are engineered to meet or exceed OEM specifications, providing reliable performance and backed by Sierra's industry-leading warranty for the useful life of the product.