Vibrating issue

[charliebabb]

Hey guys, im having a weird vibrating issue. My ski runs fine at idle but when i rev it up it seems to vibrate on its descent back to idle speed. Any thoughts? I took the pump off and that's not the problem. I included a video. Any thoughts? Maybe rotary valve?

Thanks guys,
Charlie

http://www.youtube.com/watch?v=iWLqDQ2OSFg&feature=youtu.be

 

[LouDoo]

I can't really tell anything, sounds normal for a ski out of the water. If it's not the pump or the drive shaft its probably the motor mounts.

Lou

 

[charliebabb]

Yeah maybe im paranoid. My mounts are good though. This sound started happening right after i had my ski out for a long days ride. Probably put 12 hours on it that day.