2006 fx1100-e impeller

Ski wont go over 3 mph, revs like bad prop. Removed prop and it looks ok with very small tolerance.
what am I missing?

More info, when I charged the battery this season and then tried to start it , it acted as if it was a seized engine. I replaced the battery thinking it was not strong enough and then POP, it started to turn the it started and runs well. The impeller is acting as if it is a spun hub which I dont think is possible.

Thanks.... John