[Hotfingrs]

First, have never heard of figuring fuel needed that way....Second, your math is off...should be 67 1/2 gal/hr pumped...2.25 x 120 = 270 qts in an hr/ 4 qts gal=67.5....that's a pretty lame figure for an electric pump. My mechanical pumps output is 140 gal/hr....Most street electric pumps are in the 110-140 range.