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Cessna 172 - Starting Engine

Cessna 172
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!f
I·
I
, . I
points
on the inboard side of the
two
front
seats.
A separate seat
belt
half
'
and buckle
is
located on the outboard side of the
seats.
Inertia reels
allow
l.
complete freedom of body movement. However, in the event
of
a
sudden
deceleration,
they. will lock
up
automatically to protect the
occupants.
NOTE
The
inertia
reels
are
located for maximum shoulder har-
ness
comfor~
and safe retention of the
seat
occupants.
This
location
requires
that the
should~r
harnesses cross
near
the top so that the right hand
inertia
reel
serves
the
pilot and the left hand
reel
serves
the front passenger.
When fastening the harness, check to ensure the proper
harness
is
b.eing
..
used.
To use the ·
seat
belt/shoulder. harness, adjust the metal
buckle
half
on
·:
the
harness
up
.
far
enough to .allow.it to be drawn
across
the
lap
of
the
occupant and be
f~stened
_into tpe .outboard
seat
belt buckle.
~djust
seat
belt tension
by
pulling
up
on
the shoulder
harness.
To
remove
the
seat
belt/shoulder
harness,
release
the
seat
belt buckle and allow
the
inertia
reel· to draw the
harness
to
th~
inboard _side
of
the
seat
.
. ·
STARTING .
EN
GI N_E ..
During engine starting, open the throttle approximately 1/8
inch.
In
warm temperatures,
one
or
two
strokes
of
the
primer
should
be
sufficient.
In
cold weather,
up
to
six
strokes
of
the
primer
may be necessary.
If
the engine is warm,
no
priming will be required.
In
extremely
cold
tem-
pe~atures,
it may be
necessary
to continue priming while cranking
the
engine.
Weak intermittent firing followed by puffs
of
black smoke from
the
exhaust
stack
indicates overpriming
or
flooding. Excess fuel
can
be
cleared
from the combustion .chambers
by
the following procedure:
Set
the mixture control full lean and the throttle full open; then crank
the
engine through
several
revolutions with the
starter.
Repeat
the
start-
ing procedure without any additional priming.
If the engine is underprimed (most likely
in
cold weather
with
a
cold
engine) it will not
fire
at
all, and additional priming will be necessary.
As soon
as
the cylinders begin to fire, open the throttle slightly
to
keep
it
running:
2-10

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