I might have made one of the biggest mistakes in awhile but i bought a 150 Mariner outboard and it wont pee with the muffs on. the motor cranks great and trottles up great but no water coming out the hole. i checked the hole for dirtdaubers and it was clear so i took the hose off at the motor and no water. could the waterpump be complettly gone? or could the themrostat be froze up or what? dont want to start tearing down something i dont have to. any advice? i think it is a mid-80's motor.