I have a mid 80's 7.5hp that runs good except it gets hot....really hot
I replaced the impeller and took the intake off and cleaned all the passages and it does not spit water out unless it is in gear. I have the Honda motor flusher that goes over the screen on the lower unit that a garden hose attaches to and with it in neutral no water comes out the check hole. With the prop off and in gear it pumps great. Also when at idle the green oil light stops. The engine gets so hot that water boils on it
I replaced the impeller and took the intake off and cleaned all the passages and it does not spit water out unless it is in gear. I have the Honda motor flusher that goes over the screen on the lower unit that a garden hose attaches to and with it in neutral no water comes out the check hole. With the prop off and in gear it pumps great. Also when at idle the green oil light stops. The engine gets so hot that water boils on it