Impeller clearance

Jamz33

Petty Officer 3rd Class
Joined
Jun 14, 2018
Messages
83
I am trying to find out what the clearance should be between wear ring/impeller housing and the impeller should be. It’s a 1991 Yamaha Waverunner 3 650. I have searched the web and can’t find an answer for that particular ski. Anyone happen to know? It won’t plain out and impeller looks good. There is what seems to be a pretty big gap from what I’ve read about other clearance specifications.
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
47,527
depends on the cut of the impeller

however first thing to check is compression. however a quick google search lists about 0.020"
 
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