Several years ago I picked up this motor(QD 17) at a yard sale. It started right up but no water was coming out of the pee hole and the motor started getting hot so I shut it down. I removed the bottom end and checked out the impeller which looked to be in good shape but I replaced it anyway. Started right up again, but again, no water squirting out and the engine got hot and so I shut it off! So, assuming that everything was put back correctly, what should I look at next? In my research I believe this engine did not have a thermostat. I'd hate to take off the head if not necessary but wouldn't have a problem doing it if that is what it will take. Thanks!