Originally Posted by Ridin' Green
I'm betting that the tanks capacity is actually what they claim, but you can't actually get that much fuel in there by filling them normally since the EPA buttheads make them comply with the stupid filler neck/airspace rules. When I fill my mower at the station, I fill it to the bottom of the neck, then start slowly filling it from there. By shaking the machine lightly while filling I can almost always squeeze another gallon to gallon and a half into it and stilll not be all the way up to the top of the tank's neck.
Ridin' you were 100% correct. I filled both my tanks today and had huge air pockets!