Sea-Dog Sea Dog Inboard Motor Flush. 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. Features of Sea-Dog 521550-1 Sea Dog Inboard Motor Flush Quickly flush away salt sand minerals and contaminates from your lower unit cooling system Designed for quick and simple installation Fit the rubber cup over the water intake connect a garden hose and extend the aluminum leg sealing cup to the hull No tools required Great for winterizing tune-ups and other maintenance that requires running an inboard engine out of the water Package Contents: Sea-Dog 521550-1 Sea Dog Inboard Motor Flush Sea-Dog 521550-1: Sea Dog Inboard Motor Flush