Mine is opposite, it shows empty when it still has about 1/8 of a tank so it is pretty accurate. I would much rather it show less than actual than the other way around. No way should it show 1/4 or more and run dry. New sensor time.
Fuel consumption sounds about right. Roughly 1.5 hrs runtime per gallon.
Specs say tank holds 8.3 gallon and did you have it completely full. About 2 gallons per hour doesn't sound bad for a near 40 HP engine.Just got off the phone with the dealer, he said they have seen it before, and what happens is the float hits the side of the tank and doesnt drop all the way.
He is sending one of his guys over this afternoon to fix it.
Still a little shocked I ran it dry at roughly 16 hours of LIGHT use!