I am looking at buying a 1991 Bayliner Trophy 2002. I know it need plenty of work which I like to do but the 150 mercury which is a 1998 is bolted to a 1.5' by 1.5' aluminum plate (which is on the out side of the transom) I cant see any cracks on the inside or out side but of corse the aluminum plate is covering most of the area. I this somthing I should stay away from?