SECTION
4
NORMAL
PR,OCEDUR,ES
CESSNA
MODEL 172P
1
ã. Mixture
--
FULL
RICH.
6. Throttle --
OPEN
US
INCH.
7. Ignition
Switch
--
START.
8.
F,elease ignition
switch to BOTH
when
engite starts.
L
Oil Pressure --
CHECK.
Without Preheat¡
Prime the
engine
six to ten
strokes wbile the
propeller
is being
turned
by hand
with
the throttle
closed. Leave the
primer
charged
and ready
for a stroke.
Propeller
Area
--
CLEAR.
Avionics Power
Switch
--
OFF.
Master
Switch
--
ON.
Mixture --
FULL
RICH,
Iguition
Switch
--
STAFT.
Pump
throttle rapidly
to full
open twice.
Return to
1/8 inch
open
position.
F,elease ignition
switch to BOTH
when
engine
starts.
Continue to
prime
engine until
it is running
smoothty,
or alter-
nately,
pump
throttle
rapidly
over first f-l4
ot total
travel.
Oil Pressure --
CHECK.
Pull carburetor
heat
knob full
on after
engine tras
started.
Leave
on
until engine
is running
smoothty.
Primer --
LOCK.
2.
3.
4.
Ð.
6.
7.
L
o
10.
11.
L2.
NOTE
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. Preheat must be
used bofore another start
is
attempted.
CAUTION
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. An outside
attendant
with a fire
extinguisher
is
advised for cold starts without
preheat.
During cold weather operations no indication will
be apparent
on the
oil
temperature
gage prior
to takeoff if
outside air temperatures are very
cold.
After
a
suitable
warm-up
period
(2
to 5 minutes at 1000 nPM),
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
takeoff.
4-22
30
May 1980
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