fishead

I was out for the first time in my repowered cat and everything was fine until the left engine started to rev up.It did not just jump but took its time.Well I pulled the power back and into neutral.I then tried to put back in gear and nothing,forward or reverse.Oil was fine.They are twin disc 502 with a 1.54 ratio.Does anybody have any ideas and does anybody have one of these to sell.
Mark


PS By the way the boat was running awesome with my new Troy Dennis 800hp small Blocks,unbelievable power.