When it is suspected that a vapor lock exists, the
follawfng
procedures should be used:
Fuel selector ON, electric fuel booster
Pump
ON,
throttle opened
l/4,
push mixture control to full rich and
leave there until fuel pressure builds up and cavitating sound
disappears,
then return migture control
ta
idle
cut-off and proceed
with normal starting sequence.
If a solid vapor lock exists, the
engine primer is usually ineffective until the vapor lock
2s
broken
by the method mentioned above."
If
of1
pressure does not build up after 30
seconds
running, stop
engine and determine trouble.
Check Engine Driven Fuel
Pump
for proper pressure by turning off
auxiliary fuel
pumps
I
Initial warm up should be at 1000 to 1200 RPM.
ENGINE
WARM-UP
Engine is warm enough for take off when the throttle can be opened
without backfiring or skipping.
,
Check magnetos at 2600
RPM.
Drop off should not exceed 175 RPM on
either magneto and should be withfn 50 RPM of each other.
Exercise pro eller
at 2200 RPM. Pull control to decrease RPM, note
drop to 1275
P
50 RPM,
Cowl flaps should be open for all ground operation (pull handle out).
Avoid prolonged ground operation as it will cause overheating.
For further
information
on cold weather starting and engine operation,
consult the Lycoming Operator's Manual.
c
9
OPERATION
TAKE-OFF: Prior to take-off, a check should be made to insure that;
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General