I believe the official numbers are 4,420 gross on the trailer w/o fuel, water toys, food and drink.
The 23.5' is not quite as fast as my 15' that had only one of the same 215 HP engines (supercharged and intercooled). The small boat would do a little over 60 mph but a rough ride. The bigger boat mid 50's mph, much smoother ride. What I really love about the jet boats is the maneuverability. They turn on a dime, just like a PWC. Sorry to be off topic so I'll stop talking about boats.