I would try a 26p fury 3. You may loose a little hole shot but it may gain you a couple MPH. When I first repowered my 2008 Cougar with a new 250 ProXs I only had a 26 fury and was seeing mid 80’s solo with a light load. I was turning it around 5850-5900 rpm. People will tell you it is too big of a prop but it will turn it