For starters I am not sure if this should here or the Mercury page, but I assume it has more to do with the boat. I have a 191 champ with a 175 pro xs on it. Right now I have a 25p 4 blade on it and jumps right up and tops out at about 55mph. One of my friends gave me 24p 3 blade to try and I was wondering what the effect would be if I switched to that prop. I know I’ll be slower out of the water, but will it give me much on the top end? I am new to messing with props so anything helps.