I have bought a second hand 1987 35 HP Mercury o/b.<br />I now discover it has a crack above the prop,and behind the sacrificial trim fin,going all the way across the housing. It has been welded before but is cracked again. I have had the boat in the water and it seems to go ok. I beleive the bolt above the trim fin is all that is holding the section in place.Although the crack does not go vertical through the little flutes. Does this sound like I need a new houising or should I just keep on boating.<br />Regards Skeeta