Hi Steve
ive got the same boat had from new 4 years now with a TAM 41 VOLVO
like most people on here in the know, all to do with speed and sea conditions
often find when im in a rush back in i can use a lot of fuel so throttle down
mine revs flat out around 3800, i would say 5 gallons an hour would be about right..
enjoy the boat best around for the money. my boats called MIDGE keep an eye out
when your next out and come say hello....
cheers kevin