Boat weight 3900 dry, has 85 gal fuel, and will probably use half the tank if cruising around for the day. The more throttle above cruiser the more it will use
I had a Wellcraft 23 Nova XL with a Merc 260. We ran that boat all around the Chesapeake and it served us well for 18 years. It used about 7 gallons per hour when cruising.