Increases the life of ALL outboard engines! Protect your investment by flushing the motor every time you use your boat. Universal motor flusher allows the cooling system to be flushed out using a garden hose. Motor flushers help flush out salt, grime, silt and sludge out of the internal parts of your motor. Works on most outboards and inboard/ outboards. Also a great way to test run your boat before heading for the water.