UPDATE: My guy checked out the boat and says basically that the fuel mixture was a little rich, other than that everything checked out. He even gave Indmar a call to make sure he didn't miss anything. The Indmar guy basically said 'that's a carburated engine for you, only option is to go to EFI'. Nice, I'll keep that in mind the next time I have a spare 30 grand laying around for another boat.
Anyhoo, hopefully the mixture adjustment does the trick, will let you know!
Chris