The rest of the story... Boat had a SBT premium rebuilt put in last year and has 25 hours on it since then. Install was done by a private mechanic, that I am trying to identify and contact to see if a supercharger service was done. I can't imagine someone would put a 3K motor in without servicing the SC, but if I can't find out for sure, I will pull it myself and send it in.
The previous owner, who I know and trust, bought it last year after the rebuild and just has to many boats and didn't use it much.
Kind of interesting, but I will get it sorted out.
The boat runs really well and is much fun.
Any way to see if the SC is new or rebuilt without pulling it??