[77newell]

When I used to drive a highway bus that I kept overnight next to the barn, I plugged it in at night and it started in the morning. Some winter mornings were in the -14 degree range.

As to what temperature the fuel will gel, that would depend on how much of it is winter fuel and if summer how much wax (I think it is) it has in it. Perhaps a quick way to tell would be to pull a filter and see how it pour out, or siphon some fuel out of the tank and see what it looks like. I would think that if there is gel the first filter is most likely the pinch point. But hey, I've started the engine on the 77 coach at -4 with summer fuel and had no problems. I know others who had problems at 10.

In addition to heating the engine with the coolant heater would be to drain the oil and heat it hot and then dump it back in the engine and quickly start it. But, he needs to know the starter is working as it should first. Even at -14 I would expect to hear more than "click" when the starter switch is hit. If the remote start switch in the rear panel is used you should see the radiator fan move, albeit veeerrrryyy slowly. That would say the starter is working.