The perfect solution for ethanol blended fuels. Ethanol mixes more easily with water than with gasoline, increasing fuel tank condensation, fuel separation, and octane imbalance. Moeller's Clear Site Filters help the process of water removal for better fuel system maintenance. Reusable water collecting bowl extends the life of the filter by draining collected water. Easy turn thumb screw provides a positive grip while draining bowl. For 2 and 4-cycle outboard engines only. High performance 3/8" NPR ports. Not for use with diesel fuel. System includes filter head, hose barbs, fuel filter, and water collecting bowl.