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Anger management said:

Between 30-45 mph rpms are way up ... 4800-5000rpm , but the boat doesn't accelerate pass that unless I back-off the throttle a little then give her again. Then it sometimes will accelerate up to the low 60's again.
Pepe
The props cavitating like a mean mofo.

Is your prop solid hub ?

Check bottom of boat for something obvious.

Try another prop.

Try removing drive shower temp. to see if this.

Measure your X dimension.

I've had this issue many times with 3 blades but not on 4. Then again every boat is different.
 
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