1995 yamaha C115 two stroke currently on a 1985 16' bayliner. Only numbers i can find on the prop is 17K. Wide open throttle between 5500-5800 rpm. Boat cruises easily at 40 mph. Pulls tubes fine but could use a better hole shot for slalom skiing. Now the question, I will be pulling this motor and installing it on a 19.5 1986 bayliner open bow. I am sure i will need a prop change. There is almost always 6 average size people with us. Boat will be used for tubing and Kneeboarding manly with occasional skiing. After doing some reading on here it looks like I need to drop to a 15 pitch but am unsure. Any advice?
