I am new to toon Just purchased my first and am having trouble getting it up to speed. It is an older toon 1982 that has been restored. It has a evenrude 60 hp on it. My question is can anyone tell me any thing about the prop on it. It is a piranha 11 1/2 13c and it seems to me it is to small for the boat. I use it for pleasure and try to pull my kids and grand kids on a tube and the motor only turns 5000 but in a turn it drops to 4500. Any help would be great .