Prop advice
 

Best prop for a yamaha f115 four stroke?

I have a Solas amita 12-3/4 x 17 4 blade stern lifting prop on a Yamaha F100. I think the same prop would be good for you if your lower unit has less reduction than mine. I think it does. I can check when I get home. What year is the motor?

its a 2003

It looks like you have a 1:2.15 gearcase, I have the 1:2.31. I turn 5400-5600 RPM with a F100. I think the same prop would push your boat faster and run closer to the 6000 RPM redline at WOT, which would be a good thing.