115 yamaha prop size

[Jetty Rocker]

I repowered at the end of the last season with a F-115 Yamaha and I ran a 3 blade 17 pitch alluminum (Yamaha) prop that gave me good results. I tried a 4 blade stainless 17 pitch (Solas) but the cup or something was different and the results were terrible. I purchased a 3 blade stainless Solas 17 pitch that I have not tried yet. With the 17p Yamaha Al prop my top end was 32mph turning 6000 rpm with 5 adults and a 160 qt cooler filled with provisions. I averaged 4 mpg which is a lot better than the 1.5-2mpg that I was getting from the 225 oceanpro. You want to run the 115 four stroke Yamaha on the high end of the rpm range and that motor is a 5000-6000rpm engine. hope this helped.