I have a 45 cc Ryobi weed eater moter that I just started to build an rc hydroplane boat body for. So far the the pontoons are done and measure 12 inches by 3 and 1/2 feet long. the body is going to be about 5 foot total length. I have all the needed items for the rig set up except the pro. I do not know what sise to put on it.? Any suggestions would be great. How do you tell the size of the props diameter?
Bobby