Hello, I have a client whose ski won't rev past 5500. He rode it for 15 mins once in the water and then the issue re-appeared.

Here is what he has done so far -
changed coil packs, leads and plugs
checked fuel pressure - 52psi while under load
has an aftermarket S/C belt - will change to an OEM type
Jetpump has been rebuilt
rebuilt the S/C belt tensioner

It will free rev out of the water no problem