My 18ft crestliner kodiak has a 60hp merc on it with the command thrust (lower unit off a 90hp). It came waaaay over propped with a 19 pitch, need to swap it out with a lower one but I can troll all day at about .2-.3gal/hr. Tops out at about 22mph at 3800rpm which is how I knew its got too much pitch in the prop. I contacted the dealer and they sent me a 13 pitch prop but it takes a different hub assembly. The prop on it now is a 4 blade and the 13p is a 3 blade. One thing I noticed with the 4 blade prop is that boat will run like its on rails. Its a tiller and I can turn it as fast as I want to on step and it will run like its on rails and not cavitate at all.
