Continental Motors A Series Operator's Manual page 27

DESCENDING AND LANDING.
1.
The mixture control must be in "FULL RICH" position
during descent.
2. If a long glide is made, apply power at short intervals to clear
the cylinders and retain engine temperatures in the event that
instant power is required.
3. Carburetor heat is available only at engine outputs well
above idle. Apply carburetor heat before dosing the throttle and
place carburetor heat "OFF" before opening the throttle so full
power will be available if necessary.
STOPPING THE ENGINE.
1. Normally the engine will have cooled sufficiently during the
glide and taxiing period to permit placing the ignition switch in
the off position without additional idling. If taxi time has been
excessive, operate the engine at 800-1000 RPM for two or three
minutes before stopping.
2. If the engine
is
equipped with a Stromberg NA-53A1
carburetor, stop from idling speed by turning the ignition switch
to "OFF". As the engine stops open the throttle rapidly, and leave
it open to prevent after-firing. If the carburetor
is
a
Marvel-Schebler MA-3PA model, stop by moving the mixture
control to the full "lean" position, where it acts as an idle cut-off.
Do not open the throttle, because it actuates the accelerator pump
and rapid opening will flood the engine.
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