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Turn master switch "ON".
(3)
(4)
Turn ignition switch to "START".
(5)
Pump throttle rapidly to full open t wice.
open position.
(6)
Release ignition switch to "BOTH" when engine starts.
(7)
Continue to prime the engine until it is running smoothly,
or alternately, pump the throttle rapidly over the first
total travel.
(8)
Oil pressure -- Check.
Pull carburetor heat on after engine has started.
(9)
on until the engine is running smoothly.
(10)
Lock primer.
If the engine does not start during the first few
attempts, or if engine firing diminishes in strength,
it is probable that the spark plugs have been frosted
over.
attempted.
Excessive priming and pumping throttle may cause
raw fuel to accumulate in the intake air duct, creat
ing a fire hazard in the event of a backfire.
occurs, maintain a cranking action to suck flames
into the engine.
extinguisher is advised for cold s tarts without pre
heat.
OPERATION.
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
accelerate the engine several times to higher engine RPM.
accelerates smoothly and the oil pressure remains normal and steady,
the airplane is ready for take-off.
Rough engine operation in cold weather can be caused by a combina
tion of an inherently leaner mixture due to the dense air and poor vapori
zation and distribution of the fuel-air mixture to the cylinders.
effects of these conditions are especially noticeable during operation on
Preheat must be used before another start is
An outside attendant with a fire
NOTE
IMPORTANT
(2
Return to
1/2"
1/4
Leave
If this
to 5 minutes at
I f the engine
of
1000
RPM),
The
2-19
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