Which throttle setting to start push lawn mower?
The kill switch wire is broken or has come loose. If it is a push mower, look at the end of the throttle cable where it touches ground when the lever is in the OFF position. If it is a riding lawn mower, follow the wires from the ignition switch, you will find a disconnection someplace near ground (by the throttle cable bracket on my rider).
What do i fix when the lawn mower engine stops 2-3 seconds after it starts unless you continue to prime it?
One thing I have done is check the spring on the throttle. I had this happen and the spring that holds the throttle in a specific location had come unhooked. I simply held the throttle open, had another person sstart the mower and then reattached the spring to hold the throttle open in the desired position.
No, Archimedes did not invent the lawn mower even though one of his attributed inventions paved the way for that invention 2,000-plus years later. The lawn mower invented by an English textile mill engineer in 1830 had the name Archimedean revolving cutter mower. The mower in question included a revolving screw-shaped blade inside a cylinder, considered the essential design of the Archimedean screw attributed to Archimedes' (287 B.C.-212 B.C.) inventiveness.