Fuel injection systems on today's outboard and inboard engines are very sensitive to contaminates. Dirt and moisture can find a way into fuel to clog and damage injectors. Fuel filtration is the first line of defense and regularly changing the filters is the best way to keep your engine running smoothly. These Racor spin-on replacement filters provide a 98% efficiency rating at 10 microns and feature Aquabloc to remove almost 100% of water contaminates. Available in common sizes, keep one handy for a quick change.