Mine did not act that way but I have the same boat/engine/hours on mine. Replaced fuel pump assy last week for whining fuel pumps and chips in the fuel pressure regulator screen, and still boat backfires, no power, and will not rev over 3600rpm under load. Was at the marina with mechanic yesterday lake testing with the laptop and all it well, so we are now thinking the paint has clogged the fuel injectors not causing enough fuel flow. New injectors to show up today, and I'm putting them in for lake test later tonight.. I would get a fuel pressure test gauge from any parts store and follow these videos on the fuel system. If your pump assy has not been replaced, it will need it sometime down the road.
https://mancavemechanic.com/