SECTION 4
NORMAL PROCEDURES
CESSNA
MODEL
172S
Should
the
engine tend
to
die after starting, turn
on
the auxiliary
fuel
pump
temporarily
and
adjust the throttle and/or mixture
as
necessary
to
keep the engine running.
In
the event of over priming
or
flooding, turn off the auxiliary fuel
pump,
open
the throttle
from
1/2
to
full
open,
and
continue cranking with
the
mixture full
lean.
IWhen
the
engine starts, smoothly advance the mixture control
to
full
rich
and
retard
the throttle
to
desired idle speed.
If
the engine
is
under primed (most likely
in
cold
weather with a
Icold engine) it will not start at
all,
and
additional priming will
be
necessary.
I After starting, if the oil pressure gage does
not
begin
to
show
pressure within
30
seconds
in
the summer time
and
approximately
one
minute
in
very
cold
weather, stop
the
engine
and
investigate.
Lack of
oil
pressure
can
cause serious engine damage.
NOTE
Additional details concerning cold weather starting and
operation
may
be found under
COLD
WEATHER
OPERATION paragraphs
in
this section.
I
RECOMMENDED STARTER DUTY CYCLE
Crank
the
starter for
10
seconds followed
by
a
20
second
cool
down
period. This cycle
can
be
repeated
two
additional times,
followed
by
a
ten
minute cool down period before resuming
cranking. After
cool
down, crank the starter again, three cycles of
10
seconds followed
by
20
seconds of
cool
down.
If
the
engine still
fails
to
start,
an
investigation
to
determine
the
cause should be
initiated.
14-20
Revision 4
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