Sierra marine fuel water separator kit — white, 10‑micron element, 90 GPH high‑flow protection

The Sierra International 18-7982-1 is a marine fuel water separator kit that removes emulsified water and particles down to 10 microns while flowing up to 90 gallons per hour.

Designed for gasoline engines on boats, this white Sierra marine fuel water separator combines a tall aluminum filter housing with a 10-micron element to protect fuel systems from water and debris. It fits universal applications with 1/4" (6.4 mm) connections and is built to handle high-flow demands so even larger outboards and sterndrives receive clean fuel without restricting performance.

How does this separator protect my engine from water and contaminants?

The separator uses a 10-micron filter element and separation media engineered to capture particles and shed emulsified water so contaminants don’t reach injectors or carburetors. Sierra specifies removal of over 99.8% of emulsified water and more than 90% efficiency for particles at the 10-micron size, reducing corrosion and fouling risks in fuel systems.

• 10-micron element captures fine particulates and sludge
• Removes over 99.8% of emulsified water from gasoline
• Protects injectors, carburetors and fuel pumps from wear

Will this unit keep up with high-flow motors?

Yes—each filter in the kit is rated to flow at 90 gallons per hour, which accommodates many high-demand outboards and inboard systems without creating a bottleneck. The high flow rating means you can maintain filtration performance even at wide-open throttle conditions.

• 90 GPH flow rating per filter for sustained fuel supply
• Suitable for thirsty multi-cylinder outboards and sterndrives
• Maintains fuel pressure and engine response under load

What are the physical specs and installation points to know?

This kit uses a tall aluminum filter housing and 1/4" (6.4 mm) fittings for universal compatibility on many marine fuel lines. The white finish and compact profile make it straightforward to mount in engine compartments where space is limited; follow manufacturer instructions for secure mounting and leak-free hose connections.

• Housing material: aluminum (tall filter configuration)
• Connection size: 1/4" (6.4 mm) hose fitting
• Universal fit design for inboards, sterndrives and outboards

How often should the filter be serviced or replaced?

Service intervals vary with fuel quality and operating conditions, but regular inspection and periodic replacement of the 10-micron element keeps filtration effective. Replace the cartridge when flow diminishes, aftermarket indicators signal blockage, or according to your engine manufacturer’s maintenance schedule.

• Inspect filter during routine engine checks and winterization
• Replace cartridge when flow or fuel pressure drops noticeably
• Follow engine maker recommendations for interval guidance

Who is this for: The Sierra International 18-7982-1 kit is aimed at boat owners, mechanics, and fleet operators who need reliable fuel filtration for gasoline marine engines. It’s a practical choice for those running high-flow outboards, sterndrives and inboards who want a durable aluminum housing, a 10-micron element, and proven water separation performance to reduce maintenance and prolong fuel-system life.