Mixture control

[wiscstar]

The mixture control on the Spitfire doesn't respond.  I've tried several different key combinations but nothing seems to work.  Is there a bug in the game?  What can I do?

[Dawson]

It works but if I recall it may not allow you to set mixture to auto lean if you're engine is running hard. Try reducing RPM to 2200 (prop 40% maybe) or so and manifold pressure to +2 or lower. Altitude may also come into play so try below 15,000 feet.