Yes Frank, it fits all those motors you mentioned. I guess that a sea trial is the only way to find out. I am putting an 18 together right now. I have a 9×10 that I was saving to put on that motor. So called weedless prop. This wide paddle might work on the 18. I wish I could find a book about propellers. Something simple and informative. Pine tree guys managed to get 30mph from a 15 OMC motor. Racers secret on how they did that! thanks
dale
