2000 gtx run great out of the water but not in water

[Dadof3]

My 2000 gtx will rev up on the slip, out of the water, but in water I can’t get it over 10-12 mph.
In investigating the issue, I removed a chuck of wood from the prop. I had hoped that would do the trick and, like I said i could rev the rpm’s up to 6k+ or so when it’s out of the water, but once its in the water I can’t get the rpm’s over 4k and speed over 12 mph.
And ideas?

 

[2strokeboy]

Check the wear ring for the slow speeds. Low rpm could e a multitude of things. Raves, carbs, electrical, fuel system.

 

[mikidymac]

Check compression.