marius scheepers wrote on Feb 7^th, 2013 at 9:19am:

I must add, that touch wood off course i have not yet had this problem of the engines not starting, i follow basically the same principal as you would on the 747 or 737, on the 777 you need to close some valves to bleed air from the APU to the correct engine you want to start, once you have the fan moving moving (cant remember what the figure is right now) i flip the Fuel Cutoff switch to on, i then close the valves to the running engine and open the no 2 engine valves and do the same.

The default startup state of MSFS is 'engine(s) running' - default Cessna at Seattle, the ultralight over Friday harbour respectively. So whenever you switch to your favourite A/C, fuel mixture is already set to 'full rich' right from the start.

Try this one:
Load the default Cessna with engine running. Then drag the fuel mixture lever to 'full lean' (cutoff).
Now load another jet A/C (could be an addon A/C by a different developer or even one of the default jets).

As far as I remember, the jet engine(s) will be off. And to get them back to life again, your usual flow will not get them running again: You must set the fuel mixture to '(full) rich' at the appropriate time (by means of this key stroke command) to work yourself around the MSFS internal bug ...