Hey Rick,
The mechanic working on it says they tried manually adjusting the throttle, and the clutch was likely faulty, as it wouldn't engage/disengage very well. But they said it was probably cheaper to replace the whole thing than try to rebuild it. They are saying the part is difficult to get from their distributor, and they can't work on this until October. They are quoting me at least 4000 to replace it.
I should say that the very first time I got this boat, the alternator died, and I was stranded in a rocky area for 45 minutes until I could get a tow. I think it may have damaged the drive shaft and cutlass bearing, which I both replaced early last year. Therefore, it is possible that the gearbox was also damaged during all of this.
I loved this boat, but I went ahead and upgraded to a newer / bigger boat, so I will likely sell this Epic X22 as is with the gear issues until I can fix it this fall.