· Thread Killer
2007 Gordon Waterman 70hp Yamaha Tiller
It would help if you installed a tiny tach to get your rpm's. It's very important with choosing a prop. My old man is running a 3 blade powertech (with a decent amount of cupping) on his cc classic with a 4 stroke yammy, I'll check with him. He also has a cmc trim and tilt and that helps the boat run a little swallower.