Why did I spend so long loving bike commuting but hating pushing a gas (later, electric) lawn mower on weekends? The solution was there all along: the push-reel mower, the "old-fashioned" human-powered lawn mower that, like the bike, is in many ways superior to its engine-powered cousin.
Now that I no longer have to spend time trying to start a gas engine or lay extension cord, I mow my lawns much, much faster. The physical effort required to push the mower is actually less than for my old, heavy electric mower, because the reel mower is so light.
I'm realizing that most of the arguments in favor of bike commuting apply here:
Have a short commute/small lawn? Don't like buying gas (or kilowatts)? Don't want a big heavy thing taking up space in your garage? Interested in paying half as much for a human-powered vehicle? Here you go: http://www.target.com/inch-Scotts-Cl.../dp/B00004RA3E