Skip to content
Stainless steel NRX Refrigerators are back in stock!
Stainless NRX Refrigerators back in stock!

Marine Fuel Water Separators

Protect your engine from fuel contamination with Sierra's marine fuel water separators. Designed to remove water and debris from your fuel system, our Sierra Marine filters ensure clean, reliable fuel flow for both inboard and outboard engines. Shop direct replacements for top brands like Mercury, Mercruiser, Yamaha, Suzuki, and Honda. Backed by our industry-leading warranty, Sierra's aftermarket parts meet or exceed OEM standards. Shop all the parts that keep you moving, or search the entire catalog through our parts-finder tool.

Free Shipping

When you spend $50+

Contact Support

Talk to a real human on our team

Find a Dealer

Find your local SIERRA or Dometic dealer

Fuel Water Separators: Maximizing Purity in Marine Fuel Systems

Fuel water separators are an essential component in maintaining the health of a marine engine, efficiently removing water, sediment, and other contaminants from fuel. They play a crucial role in engine care by preventing water-related damage and maintaining fuel efficiency.

Choosing the Right Fuel Water Separator

The type of fuel water separator needed depends on the engine size, the type of fuel used, and the specific performance requirements of your vessel. It's important to match the separator to your engine's flow rate and to consider whether you'll be operating in environments where there may be a higher risk of water contamination.

Maintaining Your Fuel Water Separator

Draining a fuel water separator regularly is key to preventing build-up and ensuring the engine runs smoothly. It's typically recommended to drain the separator after every 50 hours of engine use or, at minimum, as part of your regular seasonal maintenance.

Service Life and Replacement Intervals

The service life of a water fuel separator filter can vary. Generally, a filter should be replaced at least once a season, depending on the frequency and conditions of use. Always inspect the element during regular maintenance and replace it if you notice signs of wear or degradation to ensure continued protection for your engine.