Top Speed??

[chumbucket]

MJ, Try the 19 pitch prop before buying anything new. Most of the Yammis use either a 17 or 19 pitch prop. I would try the 19 first and if you're close to 5200 or better, stay with it. If you only need a couple hundred more RPM's, then try a 17. If you think you do need a 17 pitch, let me know before you buy one. I think I've got an extra laying around. It's not the best but it would certainly tell you if it would work or not.