didn't notice this before when hooked up on muffs.<br />i have a 87 merc 135hp. I just changed the water pump and went all back together fine. I hooked it up with muffs and cranked it to be sure it pumped. What i did notice what water coming out of the prop with the exhaust. is this normal or did it not seal off between the pump unit and where the exhaust comes down the motor? Water comes out of the tale tail really good and the motor isn't over heating. Any advise would be appriciated.