The engine, I think
6,250 J
If your push lawn mower is not working as well as it used to work, you might be thinking about replacing it. Before you purchase a new push lawn mower, check your current mower's blade. Over time, lawn mower blades grow dull and no longer cut grass as effectively. If you take your lawn mower blade to a hardware store that offers a blade sharpening service, you can usually get the blade resharpened for a small fee. With a newly sharpened blade, your old lawn mower could be working just like new.
6,250 J
Lawn work
A lawn mower is a machine that cuts grass. It can be motorized or not. It can be pushed or you can ride it. It means work.
The same as any riding mower. The following is a site which explains how the work: http://www.ehow.com/how-does_4689999_rideon-lawn-mower-work.html
it depends what kind..........
Mowing the lawn works triceps and your chest.
how does the power take off system work on 1200 Massey Ferguson lawn mower
It depends on how rusty it is!
you press 5000
It mows grass faster