jmurray01...
I would guess that it depends on how many gallons or fractions there of that the tank holds:biggrin:...
& how heavy the grass is that your cutting...
How is everything in Scotland?
Seriously, I have found the smaller gasoline engines on push mowers to run out of fuel about the same time I need a break... around 1 hour, with a smallish tank, up to two hrs, with a large tank... at that time I REALLY want a rider mower... :smile:KennyV