Cessna 172R, Operating Handbook

Page: 147 / 500

CESSNA
MODEL 172R
SECTION 4
NORMAL PROCEDURES
When using an external power
source, the
master
switch
must
be in
the OFF position before connecting the external power source
to
the
airplane receptacle. See Section 7, Ground Service Plug
Receptacle for external power source
operations.
Cold weather
starting procedures
are the same as
the
normal
starting procedures. Use caution
to prevent
inadvertent
forward
movement
of the airplane during
starting
when parked on snow or
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
before
another
start
is attempted.
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 RPM),
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.
WINTERIZATION KIT
A winterization kit is
provided and may be
utilized when
cold
weather
operations
are conducted.
Revision
7
4-35