I have a 17' Tournament TX with a new 50 hp 2 stroke Mercury. I put a four blade, stainless Trophy Sport prop on it. It is 10 5/8 X 12. I run a little more than 32 with me and a full load of gear. This is at about 5700 rpms.
Hole shot is great. . . well, as great as you're going to get with an old boat and a 50 hp outboard.