I have the same problem with my 2009 18 ft challenger with the 255 hp. I get 2-3 sec of cavitation at full throttle from standing start. Took it back to dealer while still under warranty for a test ride. Technician said it was "normal" to do that. He said that it is not a problem. Funny thing though, this is my 4th jet boat, and the 1st one to do this.
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