Engine cutoff/run key

Can anyone tell me what is the key assigned (or where can I do it) to switch between engine cutoff and run? For Boeing

I’m not sure I understand your question but I believe what you are looking for is Throttle X Decrease. Where X = the engine you are cutting.
So for a single engine aircraft that would be Throttle 1 Decrease.

Hopefully that is what you are asking.

Not really. That is what I meant

I tried setting key binding for “Set engine fuel valve” and “Toogel engine fuel valve”. Didn’t work

Look for fuel flow not valve… Im pretty sure, I have it set in my binds for the caravan, but Im installing win11 (may god have mercy on my soul) right now and cant look to what I have the bind set to.

ie left stick rich / lean fuel flow right stick throttle…when I get the machine back up I’ll look and see what I have it bound too.

Okay Im back I just looked and its set for this.
try this one : Mixture Axis

Doesn’t work. It is not axis, is just on/off and those can’t be set by a button.