Seachoice 18331 - Adjustable engine flusher, large rubber cup, 18.5''-31''

Inboard motor flushers quickly flush away salt, sand, minerals and contaminates from your lower unit cooling system extending the engine's service life. Easy to use just fit the rubber cup over the water intake, connect a garden hose and extend the aluminum leg sealing cup to the hull. Fresh water flushes the cooling system, no tools required. Great for winterizing, tune-ups and other maintenance that requires running an inboard engine out of the water.