Extend engine life by flushing after saltwater use. When left in the cooling system, saltwater can cause corrosion that can lead to expensive repairs and possible engine failure; flushing the engine with freshwater helps to combat this corrosion. Our outboard motor flusher provides a way for boaters to connect their outboard or inboard/outboard to a freshwater source to run the engine to effectively flush out saltwater and silt. The universal rectangular cups are held over the engine's intake by a spring loaded clamp and supplied freshwater from a single garden hose. The outboard motor flusher can also be used to perform tune-ups and other maintenance conveniently in your driveway or shop. Flush your engine's cooling system and keep corrosion at bay with a West Marine outboard motor flusher.