Drive ratio Hi can anyone help please, I want to change my drive, I have a 24foot extreme powerboat weighs 2.1tons engine is a merc 525 Racing with a xr 1 1.50 ratio spinning a 4 blade 30 pitch Erving to 5,100 at wot. I want to change to a bravo 3 xr drive but not sure what ratio I need and What...
