the prop on my big boat is a 16-16 cupped and its starting to show some cavatation on the fwd side of the blades near the base and on the rear of the blades near where the cupping starts. i'm going to buy a new prop soon, i think i'm a bit under pitched (wot is 4800 and should be 42-4600) can these marks give me any usefull info for selecting a new prop?
