I have a Honda GCV190/Simpson pressure washer that was given to me. After a tune up it worked great until the water pressure dropped and oil poured out the bottom of the engine. It appears that the main shaft key between the engine and the pump slipped up the keyway until it disengaged with the pump and also took out the oil seal. Does anyone have any thoughts on how I can prevent the key from moving in the keyway so I don’t ruin the new oil seal?