I had a 85hp Johnson on this boat with a 13 X19 prop that I busted up, I got this 13-3/4 X 15 for $10.00 at a yard sale, it push my boat around 30mph. The 115 Evinrude was my sons motor, I have a SS 13 X 19 I'm going to try. According to Michigan Wheel it should have a 13 X 19, I'm trying all the free things first, I have a tach on my boat but I wasn't watching it, I will next time I'm out.
Joe