Yea, it quit on me too. There is a fuel selector on the lower left console. Turn it clockwise with the mouse to 9 o'clock; and I think the engine will keep running.
However, if all else fails you can go to the far right of the overhead menu -"F4U" and use the "magically start engine" feature, and it will start and keep running.
P. S. Make sure you unfold the wings, if you want to fly.