Cessna 172P Pilot's Operating Handbook And Flight Manual page 59

CESSNA
MODEL
1?2P
SECTION
4
NOR,MAL PR,OCEDURES
STARTING ENGINE
AMPLIFIED PROCEDURES
weak intermittent
firing
followed by puffs of btack smoke from
the
exhaust stack indicates
overpriming or flooding.
Excess
fuel can
be
cleared
from
the
oombustion
chambers by the
following procedure:
set
the
mixture control
full
lean
and
the
throttle full
operu
then crank the
engine
through several revolutions
with
the starter.
Repeat
the
starting proce-
dure
without any additional
priming.
If
the engine
is
ug
in
engine)
it
will
not
fire
im
soon as
the
cylinders
th
running.
After starting, if
the
oil
gage does
not begin
to
show pressure
within
30
seconds
in the
summertime
and
about twice
that long
in
very
cold
weather,
stop engine
and
investigate. Lack
of
oil pressure
can cause
serious
engine
damage.
After starting, avoid the
use
of carburetor heat unless icing
conditions prevail.
NOTE
Additional detaits concerning
cold weather
starting
and
operation may
be
found under
COLD
WEATHER,
OPERA-
TION paragraphs in this section.
TAXIING
When
taxiing, it
is important that
speed
and use of brakes
be
held to
a
minimum
and
that aII controls
be
utilized
(see
Taxiing Diagram, figure
4-
2)
to
maintain directional control
and balance.
The
carburetor heat control knob should
be
pushed
full in
during
all
ground operations unless
heat
is absolutely
necessary. When the knob is
pulled out to the heat position,
air
entering the engine is not filtered.
30
May
1980
4-rt