Why won’t my aircraft engines start, or why do they shut down on take-off, in Microsoft Flight Simulator?
If your engines will not start, or they die as you open the throttle for take-off, the usual cause in Microsoft Flight Simulator is not a bug but a missed engine-state item: fuel cut-off, wrong tank, mixture lean, magnetos off, condition lever at cut-off, no electrical power, or a bad control binding. The fix is to check fuel, ignition, power and hardware inputs in a logical order.
Why won’t my engines start in Microsoft Flight Simulator?
MSFS models aircraft systems closely enough that one wrong switch can stop the whole sequence. The exact procedure depends on whether you are in a piston aircraft, turboprop or jet, but the failure pattern is usually simple: the engine is not getting fuel, spark/ignition, air, or the correct starter sequence.
The most common trap is that the aircraft looks alive because screens light up, but the engine itself is still in cut-off. Another frequent one is a controller sending an unwanted command every time you move a lever or load the flight.
Why do engines shut down on take-off in Microsoft Flight Simulator?
If the engine starts normally but quits during the take-off roll or just after lift-off, think first about fuel starvation and mixture/condition settings. In piston aircraft, a mixture left too lean can kill the engine as power increases. In many aircraft, selecting an empty tank or leaving the fuel shut-off closed will let the engine cough briefly, then die.
On some setups, a mis-bound axis is the real culprit. A spare lever, noisy potentiometer or duplicated throttle/mixture assignment can silently move mixture to idle cut-off, close the fuel valve, or pull a condition lever back as you advance power.
Quick troubleshooting checklist
- Check fuel quantity. Make sure the aircraft actually has usable fuel loaded and that a tank with fuel is selected.
- Confirm the fuel is on. Look for fuel shut-off, fuel selector and crossfeed settings. In light aircraft this is often a simple selector; in larger aircraft it may be part of the overhead or pedestal.
- Set the correct engine controls. Piston aircraft usually need mixture rich and throttle cracked open. Turboprops need the condition lever out of cut-off. Jets need the proper start/run position for each engine.
- Verify ignition. Magnetos or ignition switches must be on in piston aircraft. If they are off, the starter may crank without the engine catching.
- Check electrical power. Battery on, and if required external power, APU or generators configured correctly for the aircraft type.
- Use the right start sequence. Starter first, then introduce fuel at the correct point. Feeding fuel too early or too late can prevent a clean start in some aircraft.
- Inspect your control bindings. Look for duplicated axes and any bindings for mixture, condition lever, fuel valve, magnetos, starter, throttle cut or engine master.
- Try with assists off, then on. If auto-start works but manual start does not, the procedure is wrong. If neither works, suspect a binding conflict, corrupted aircraft state or an add-on issue.
- Reload cold and dark. Starting from a runway or quick-start state can occasionally leave an aircraft in an odd configuration. A clean parking stand load helps isolate that.
- Test a default aircraft. If the problem only happens in one aircraft, especially an add-on, the issue may be aircraft-specific rather than simulator-wide.
Common causes by aircraft type
| Aircraft type | Most common cause | What to check |
|---|---|---|
| Piston single/twin | Mixture lean, magnetos off, wrong fuel tank | Mixture full rich, magnetos both/on, fuel selector on a tank with fuel, boost pump if required |
| Turboprop | Condition lever at cut-off, fuel not introduced correctly | Condition lever low/high idle as required, fuel pumps, starter sequence, ignition setting |
| Jet | Engine master off, no APU/bleed/air source, fuel cut-off | Battery, APU or external power, start switches, engine master/run, fuel pumps and valves |
Control binding problems: the hidden reason engines keep stopping
We see this a lot. The simulator can bind multiple devices to the same function, and an unused axis can still send jittery inputs. That means a quadrant, gamepad trigger or twist grip may be issuing commands you did not intend.
Pay close attention to these bindings:
- Throttle axis and any duplicate throttle commands
- Mixture axis or mixture decrease/increase buttons
- Propeller axis in constant-speed aircraft
- Condition lever or fuel condition settings in turboprops
- Engine master, fuel valve, magnetos and starter
If in doubt, create a clean control profile with only the essentials assigned, then test again. If the engine suddenly behaves, the problem was almost certainly a hardware conflict.
Piston aircraft: what usually causes an engine cut-out on take-off?
In Cessnas and similar aircraft, the big three are mixture, fuel selector and carburettor heat or primer-related setup, depending on the model. At sea level and in most normal departures, mixture should generally be rich for take-off unless the aircraft and field elevation call for leaning. If it is left too lean, the engine may run rough or stop as you add power.
Also check that the fuel selector is not on an empty tank and that the boost pump is used where the checklist requires it. If the aircraft has magneto positions, both should normally be selected for take-off.
Turboprops and jets: start logic matters
In turbine aircraft, the starter sequence is less forgiving. A turboprop may require the starter to bring the engine to the right RPM before you move the condition lever out of cut-off. A jet may need battery, APU or external power, then packs or bleed configuration suitable for the start, then engine start selected, then fuel introduced.
If the engine spools but never lights, suspect fuel or ignition logic. If it lights and then dies, suspect fuel cut-off, wrong lever position, or a controller pulling the engine back to shut-off.
Assists, failures and aircraft state
MSFS assistance options can both help and confuse. Auto-start can prove whether the aircraft is fundamentally healthy, but mixed assistance settings sometimes leave simmers unsure which switches still matter. If you are troubleshooting, keep the test simple: load on a stand, use a known aircraft, and either fly fully manual or let the assistance system handle the whole start.
It is also worth checking whether failures are enabled. An engine that repeatedly dies in one saved flight could be carrying over an aircraft state, damage state or system condition you did not expect.
If one specific add-on aircraft will not start
If the problem affects only one aircraft, the aircraft itself is the clue. Add-ons often simulate more systems than the default fleet, and they may ignore generic MSFS shortcuts. In that case, use that aircraft’s exact cockpit procedure rather than the simulator’s broad starter commands.
We would also test the same flight with a default aircraft. If the default aircraft starts and runs normally, the simulator install is probably fine.
What to do if you want the fastest fix
- Load a default aircraft at a parking stand with engines off.
- Remove duplicate control bindings for throttle, mixture, prop and condition levers.
- Set fuel on, select a tank with fuel, and confirm mixture or condition lever is not in cut-off.
- Check ignition and electrical power for the aircraft type.
- Start manually. If it still fails, try the simulator’s auto-start once.
- Compare results. Manual fails but auto-start works means procedure error; both fail points to bindings, aircraft state, or an aircraft-specific issue.
If you are building out your simulator setup, our Microsoft Flight Simulator downloads library is here: https://flyawaysimulation.com/downloads/.