gonefishin, I have a 17.5 Lund Pro V with a Johnson 115 and stainless prop. My boat/motor is on the older side (1996). I run a 13 X 19 prop. That is what was on the boat when I bought it. I have no complaints. Not sure if a Johnson prop would work on a Yami. If it would, I have an extra one if you wanted to give it a try. I live in Hudson if your interested.