How long does this lawn mower go on 1 gallon of gas?

Question

It's a yardmachine 21" push with a 169 cc engine... a pretty standard mower. I know this cannot give me an exact but just give an APPROXIMATE of how long it can run on 1 gallon if it was on and I was mowing with it.

Answer 1

I have a pretty similar mower.  I can fill my mower's tank about ten times with a gallon of gas.  I can run it about 1 1/4 hour on a full tank.

So, I'd say it could run about 12 1/2 hours on a gallon, imagining your mower was hooked up to a tank that big.