Sadly the impeller disintegrated without me noticing and the engine ran for a few minutes before it quit. The engine is a 1984 6 cylinder 90 hp 2 stroke. I have since removed the lower unit to find the housing was scored badly to the point where the upper portion melted and the impeller itself had disintegrated.The flywheel will turn only a full 360 degrees before it seems to be very stuck . I am at a loss as to what can be done to rectify the situation short of just purchasing a new engine .further more I am curious as to where the remainder of the impeller blades has ended up on this engine and what can be done to clean this mess up.