1988 mercury 150 xr4, 25p 5 blade prop

[ebrich2]

i clocked my boat at 58mph at 5400 rpm, can i get anymore speed from it if i change pitch or # of blades? 5500 to 5600 rpm is about the max for my motor. thanks

 

[Robbabob]

Re: 1988 mercury 150 xr4, 25p 5 blade prop

"is about" for the max rpm is vague. Confirm the max before you change.

If the conditions were perfect when achieving 5400, then a 1" pitch reduction will gain the final 200 rpm you are looking for. This also assumes you will stay with the same prop manufacturer and number of blades.

Good luck!