Five lawnmowers in one. Not sure this is the smartest way to accomplish this goal.
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World's fastest lawnmower - video and photos
1901 steam-powered lawn mower in action
Ford Flathead-powered 1970s John Deere lawn tractor
Quad-engine ride-on lawnmower - video and photo
Ride-on lawnmower motorcycle - photo
John Deere combine lawnmower made from Simplicity mower