I just got a boat with this motor on it. i put the motor in a trash can of water and after several pulls it started right up. I ran it for about 30 seconds but then shut it down after i could not see any water peeing out of it. There are 2 round holes halfway down the upper case on the back. Are these exhaust ports? Is water supposed to come out of these holes? I can't see anywhere else water would come out of. Any help would be much appreciated. Thanks