Sierra 118-7929 Fuel Water Separator Assembly with Metal Bowl 10 Micron

The Sierra 118-7929 is a marine-grade fuel filter and water separator assembly designed for inboard and below-deck installations. Built to protect carbureted and fuel-injected engines from the harmful effects of water contamination and particulate debris, this assembly is an essential part of any complete marine fuel system.

Ethanol-blended fuels absorb more water and loosen more particulates than standard gasoline, making proper filtration critical for engine longevity and performance. The Sierra 118-7929 addresses this directly with a 10 micron filter element that is over 90% efficient at removing contaminants, while eliminating over 99% of emulsified water from fuel before it reaches the engine.

Key Features:

• 10 Micron filtration — over 90% efficient at capturing particles as small as 10 microns
• Removes over 99% of emulsified water from gasoline, protecting pumps, injectors, and carburetors
• 90 GPH fuel flow rate — delivers adequate fuel flow even for high-horsepower engines
• Metal collection bowl — meets ABYC and USCG heat tests; required for below-deck and engine room use per USCG regulations
• Drainable bowl design — allows collected water to be purged to extend filter service life
• Independently tested to JIS, SAE J1839/J905, and ISO 4548-12 standards
• Replaces Mercury 35-809100, Racor B32020MAM, and Mallory 9-37883

What's Included:

• Sierra 18-7919 10 Micron Fuel Water Separator Filter element
• Sierra 18-7924 Metal Collection Bowl

This assembly is ideal for inboard engines and any below-deck installation where USCG-compliant, flame-resistant metal bowl housings are required. Cross-references OEM part numbers Mercury 35-809100, Racor B32020MAM, and Mallory 9-37883.