Cessna 172R, Operating Handbook

Page: 128 / 500

SECTION
4
NORMAL
PROCEDURES
CESSNA
MODEL 172R
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.
|When
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
|cold
engine) it
will
not start at
all, and
additional priming
will be
necessary.
|
After starting, if the
oil pressure gage does
not
begin
to
indicate
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.
4-20
Revision 7