[Ryank]

2 mpg seems to be the standard for most smaller boats 20-25 range. I compared til I was blue in the face my 225 Yami efi 2 stroke vs a new 225-250 4 stroke, and the MPG was almost identical. Might be better on a 18 or the tecs may be a bit better but 2mpg is good.
My 29 Whaler with 2 225 hondas was getting 1 mpg, thats why it needed a 400 gal tank.