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over. Preheat must be used before another start is
attempted.
Pumping the throttle may cause raw fuel to
accumulate in the intake air duct, creating a fire
hazard in the event of a backfire. If this occurs,
maintain a cranking action to suck flames into the
engine.
extinguisher is advised for cold starts without
preheat.
During cold weather operations, no indication will be apparent
on the oil temperature gage prior to take-off if outside air
temperatures are very cold. After a suitable warm-up period (2 to
5 minutes at 1000 RPM), accelerate the engine several times to
higher engine RPM. If the engine accelerates smoothly and the oil
pressure remains normal and steady, the airplane is ready for take-
off.
FLIGHT OPERATIONS
Take-off is made normally with carburetor heat off.
excessive leaning in cruise.
Carburetor heat may be used to overcome any occasional
engine roughness due to ice.
When operating in sub-zero temperature, avoid using partial
carburetor heat.
temperature to the 32
certain atmospheric conditions.
Refer to Section VI for cold weather equipment.
HOT WEATHER OPERATION
Refer to the general warm temperature starting information
under STARTING ENGINE in this section. Avoid prolonged engine
operation on the ground.
IMPORTANT
An
outside
Partial heat may increase the carburetor air
to 70
range, where icing is critical under
O
O
attendant
with
a
fire
Avoid
28
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