Pre-fuel filters with a drainable bowl, designed specifically for marine engines. Fuel water separators install between the tank and engine to filter out water and contaminants from the fuel. They are easily installed on any fuel line before the outboard, i/o or inboard engine. The spin on bowl component allows the boat owner to drain water from the element. Spin on style filter element 7919 is 10 micron and is typically replaced as part of seasonal service or as needed. Adding a fuel water separator helps engines run smoother.