Good Afternoon, My dad just picked up a new rig last week and we were curious about the prop thats on it. I see online guys talking about hitting high 20's and even into the low 30's with a 25 hp engine but with 2 guys in it we topped out at 22 mph. When I looked at the prop selector that mercury has, the prop that was on it was one of their suggested sizes: 9.5x11. I was just wondering what size you guys run or have ran. Its a 648 war eagle with an 06 Merc 4 stroke 30 hp efi model.