Cessna.

You do not need to touch the throttles at all. Do not confuse the throttle levers with the engine condition levers!!!!!

If you click on the throttle icon it will show the throttle quadrant. The condition levers are the ones on the right side of the quadrant, they are usually forward any way but make sure they are forward by using the mouse. If you look at the manual on page 31 it will show you the throttle quadrant, the condition levers are numbered 5.6.7.8 push those forward using the mouse.

I repeat, you do not have to touch the throttle levers until you are ready to fly.
John.