Let me put a BIG FORK into this idea by giving you all a better idea.
What if you are like me, you manage your fuel tanks manually. This is especially important for us Luftwaffe pilots flying the Fw-190's, or the 202/205 aircraft.
I generally run certain tanks dry and sometimes I need to restart my engine. Is it fair to punish pilots who need a simple restart? NO
What you can do is this...IF YOU MANUALLY SHUT DOWN THE ENGINE, THE TIME TO RESTART SHOULD BE 15 SECONDS. Let's make the assumption that if you shut down your engine in flight, it causes you to feather your prop, cut your fuel to starve the engine, and then adjusting the fuel mixture to dry from lean. If you restart it, you push your mixture to lean, push in the throttle a little, and engage the prop clutch. That should at least take 15 seconds in real life.
However, if you run a fuel tank dry, or cause a fuel starve situation, simply switching tanks should restart the engine automatically.
This is how it should work in Aces High.