Prop size

[xchsurfers]

Hi I`ve got a 9mtr Solent Rib with a Mercury 300hp Verado.
Currentlly running with a 14.5" x 19" 3 blade michigan prop.
Its very quick of the mark and acheives 56mph at 6350rpm. We tried a 21" pitch, wouldn`t get to max revs. We feel we are almost on the money but still feel we need to up to the level, maybe slightly larger diameter perhaps or different blade configuration
Can anyone please advise/
Allen

[beerbelly]

have you tried a 4 blade spitfire i have a 14x19p spitfire on my 115 mariner command thrust and its perfect . i bought and tried a 14x21p spitfire and although I'm still getting 6krpm i have lost midrange instant pickup so will be selling the 14x21p