I have a 1977 starcraft with a 140 mercruiser, I am leaking water in back of the boat somewhere, not a fast leak but it is a leak. i can see up in the drive, that the drive shaft boot is torn in 2 would this make it leak in the boat? if so would it have to go thru the gimble to enter the boat? the other boots under there look to be ok,I am also having trouble with my tilt and trim, the pump runs but the unit does not move, what kind and how much oil is in there , can any one help me? thanks