Textron Cessna 172R - Starting Engine

CESSNA
MODEL
172R
SECTION
4
NORMAL
PROCEDURES
If
the
airplane
has
been
operated
from
muddy
fields
or
in
snow
or
slush,
check
the main
and
nose
gear
wheel
fairings
for
obstructions
and
cleanliness.
Operation
from
a
gravel
or
cinder
field
will
require
extra
attention
to
propeller tips
and
abrasion
on
leading
edges
of
the
horizontal
tail.
Stone
damage
to
the
propeller
can
seriously
reduce
the
fatigue
life
of
the
blades.
Airplanes
that
are
operated
from
rough
fields,
especially
at
high
altitudes,
are
subjected
to
abnormal
landing
gear
abuse.
Frequently
check all
components
of
the
landing
gear,
shock
strut,
tires,
and
brakes.
If
the
shock
strut
is
insufficiently
extended,
undue
landing
and taxi
loads
will
be
subjected
on
the
airplane
structure.
To
prevent
loss
of fuel
in
flight,
make
sure
the
fuel
tank
filler
caps
are
tightly
sealed
after
any
fuel
system
check
or
servicing.
Fuel
system
vents
should also
be
inspected
for
obstructions,
ice
or
water,
especially
after
exposure
to
cold,
wet
weather.
STARTING
ENGINE
In
cooler
weather,
the
engine
compartment
temperature
drops
off
rapidly
following
engine
shutdown
and
the
injector
nozzle
lines
remain
nearly
full
of
fuel.
However,
in
warmer
weather,
engine
compartment
temperatures
may
increase
rapidly
following
engine
shutdown,
and
fuel
in
the
lines
will
vaporize
and
escape
into the intake
manifold.
Hot
weather
starting
procedures
depend
considerably
on
how
soon
the
next
engine
start
is
attempted.
Within
the
first
20
to
30
minutes
after
shutdown,
the
fuel manifold
is
adequately
primed
and
the
empty
injector
nozzle
lines
will
fill
before
the
engine
dies.
However,
after
approximately
30
minutes,
the
vaporized
fuel
in
the
manifold
will
have
nearly
dissipated
and
some
slight
“priming”
could be
required
to
refill
the
nozzle lines
and
keep
the
engine
running
after
the
initial
start.
Starting
a
hot
engine
is
facilitated
by
advancing
the
mixture
control
promptly
to
1/3
open
when
the
engine
starts,
and
then|
smoothly
to
full
rich
as
power
develops.
Revision
7
4-19
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