Its ether siezed or if its electric start the silenoid might be bad.
The pull cord of a lawn mower is used to manually crank the engine to get it started. As the engine is quickly turned, a spark is created which begins combustion.
Buy a lawn mower engine repair manual at Border's or Barnes & Noble.
very gently, or the mower will get squashed
depends on the engine but it will be on the engine block.
The sound of a jet engine vibrates more than the sound of a lawn mower.
on a racing lawn mower it would be good, just rev up your engine and will engage.
from a distance away why does a jet sound loader than a lawn mower
With the spark plug disconnected or the keys in your pocket inspect the blade or blades to see if they are damaged in any way if so replace them. There are a couple other items that may cause shacking like a bent crank shaft caused by hitting a hard object with the lawn mower blade. If the crank shaft is bent you will need to replace the engine.
A lawn mower works by converting chemical energy (energy stored in the gas) to mechanical energy.
Check the underneath of lawn mower for grass built up.
The engine, I think
Yes, it is !