Hi all, I made a jackplate for my 1983 25hp evinrude because it was roostertailing and almost -3" from the keel to anticavitation (AC) plate. It's 3" angle AL. After installing, I set it high at first (AC plate was 1" above keel). However it was cavitating and not getting on plane like it did prior to jackplate. So I lowered it down to AC plate even with keel. It got a little faster and almost on plane but still needs to drop a little I guess. Problem is, the thumbscrews are hitting the front of the plate now. They overhang the front of jackplate by 5/8". My question feels stupid, but do I need to decrease my mounting board thickness to get the thumbscrews to clear the front of jackplate or increase the thickness? I have plenty more than 5/8" of thread to play with inside the jackplate, from the outboard mounting bracket to the mounting board, and the thumbscrews will fit inside the jackplate if I can adjust the mounting board thickness in the right direction. See photos below. Geez that's long-winded. In short, does the board need to be thinner or thicker to screw in the thumbscrews more to get them inside the jackplate?
