My set-up is like this, I have a 1987 Evinrude 110 horse, model E110tlcur. My boat is a 1983 4winns Marquise 160 F & S. The prop that came with the motor, I got it used about 2 months ago, is 13 3/8 X 17.
My boat is rated for 120 horses. My top speed with this outboard is right around 45...