What size prop?

[jimmywayne]

I have a 1986 searay with a 140 h/p mercruiser I would like to buy a prop that will give me more speed I just don't know what size I can go with anyone have an ideal what is the largest size I can go with? Thanks Jimmy

 

[steelespike]

Re: What size prop?

Really need your present prop size and max rpm and speed(gps is best).