This year I tried something new. I have wanted to try a four bladed prop on my 115 Hp Evinrude, and them stainless steel props are a bit steep, so this year I got a composite 4 bladed prop. It worked well, did not do as well as I was hoping, and will use it till I can't. I do not think I got any additional speed out of it, and I don't think I pulled my son on skies to find out. I did pull my 70 lb grandson on a device but that don't count. Next year after my son adds another 10 lbs we will try. Maybe need an extra propellar.