I may have previously asked this question wrong so here goes attempt #2. I have a 1967 Glastron Fireflite V155 with a 1976 65 hp Merc (no power trim & tilt). Whether I am in the boat alone behind the wheel or if there is someone in the seat next to me the boat leans drastically to the right when moving. (is this referred to as listing?). Would adjusting the trim tab help? Any other suggestions?