Please show some respect to the intellegence of the readers.
The engine does not go to full throttle.
It goes to high idle as dose every other mower engine since about 1970 when they all became governed.
If it really urks you the pull the starter 20 times with the mower turned off.
It is a lawn mower, not a 16 cylinder race engine.
I'm with bertsmobile 1 on the throttle issue. It cranks at full throttle which is better explained below as to why.