i pulled the pump and noticed that the shaft dropped down an inch or 2. i had to replace the wear ring. once i replaced the ring i had to have someone below the ski push the shaft up a bit to get the pump back on. it ran find. looking at the design of the shaft and the output sleave i dont see how i could have that much play and have it still run ok. i still get full 47mph out of it but it seems to cavitate a little when trying to wheelie. but that could be the impeller. i can send someone a video if that would help. anything would be helpful as i dont want to rip anything apart i dont need to