Cessna 182 1978 - Carburetor; Engine Fuel System; Idle Speed and Mixture Adjustments; Oil Cooler

MODEL
182
& T182
SERIES
SERVICE
MANUAL
The
heli-coil
type insert
(4) in
the adapter
may
be
11-58.
CARBURETOR.
replaced,
although
special
tools are
required.
Follow instructions
of the tool
manufacturer
for
11-59.
REMOVAL
AND
INSTALLATION.
their use.
Inspect threads
on adapter
and in engine
a. Place
fuel selector valve
in the OFF
position.
for
damage.
Clean
adapter
in solvent
and
dry with
b. Remove
engine
cowling
in
accordance
with
para-
compressed
air.
Ascertain
that all
passages
in the
graph
11-3.
adapter
are open and
free of foreign
matter.
c. Drain
fuel from
strainer and
lines with
strainer
drain
control.
11-53.
INSTALLATION.
d. Remove
airbox
in accordance
with
paragraph
a.
Assemble
adapter
nut
(2) and
new
O-ring
(1)
11-64.
on adapter
(3) in
sequence
illustrated
in figure
e. Disconnect
throttle
and
mixture
controls
at
11-3.
carburetor.
Note EXACT
position,
size
and number
b.
Lubricate
O-ring
on adapter
with clean
engine
of attaching
washers
and spacers
for
reference
on
oil. Tighten
adapter
nut
until
O-ring
is centered
reinstallation.
in its
groove
on
the adapter.
f.
Disconnect
and cap
or
plug fuel
line
at carbure-
c.
Apply
anti-seize
compound
sparingly
to the
tor.
adapter
threads,
then
simultaneously
screw
adapter
g.
Remove
safety
wire,
nuts
and washers
attaching
and adapter
nut into
engine
until O-ring
seats
against
carburetor
to intake
manifold
and
remove carburetor
engine
boss without
turning
adapter
nut
(2). Rotate
and mounting
gasket.
adapter
to approximate
angular
position
noted
during
h.
Reverse
the
preceding
steps
for reinstallation.
removal.
Do not tighten
adapter
nut
at this time.
Use new
gaskets
when installing
carburetor.
Rig
d. Temporarily
install
filter
assembly
on adapter,
controls
in accordance
with
paragraphs
11-84,
11-85,
and position
so adequate
clearance
with adjacent
and 11-86.
(Check carburetor
throttle
arm to
idle stop
parts
is attained.
Maintaining
this
position
of the
arm
attachment
for security
and proper
safetying
at
adapter,
tighten
adapter
nut to 600
to 700
in-lb and
each
normal
engine
inspection
in accordance
with fig-
safety.
Use
a torque wrench,
extension
and
adapter
ure
11-7.)
as
necessary
when
tightening
adapter
nut.
e. Install
filter
assembly
as outlined
in paragraph
11-60.
IDLE
SPEED
AND
MIXTURE
ADJUSTMENTS.
11-49.
Be
sure
to service
the engine
oil
system.
Idle
speed and
mixture
adjustment
should be
accom-
plished
after
the
engine
has been
warmed
up.
Since
idle
RPM
may be
affected
by idle
mixture
adjustment,
it
may be necessary
to
readjust idle
RPM after
set-
11-54. OIL COOLER.
ting the idle mixture
correctly.
a. Set the
throttle
stop screw
(idle RPM)
to obtain
11-55. DESCRIPTION.
A non-congealing
oil
cooler
600±25
RPM, with
throttle control
pulled
full out
may be installed on the aircraft. The cooler is against idle stop.
mounted
on the right
forward
side
of the
engine
crank-
case
directly in
front of number
five cylinder
and has
NOTE
no external
oil
lines.
Ram
air passes
through
the
oil
cooler and
is discharged
into the engine
compartment.
Engine
idle speed may
vary among
different
Oil circulating
through
the engine
is allowed
to circu-
engines.
An engine should
idle
smoothly,
late
continuously
through
warm-up
passages
to
pre-
without
excessive
vibration
and
the idle
speed
vent
the oil from
congealing
when operating
in
low
should
be high enough
to maintain
idling
oil
temperatures.
On the standard
and non-congealing
pressure
and to preclude
any
possibility
of
oil coolers,
as the oil increases
to a certain
tempera-
engine
stoppage in flight
when the throttle
is
ture,
the thermostat valve closes,
causing the oil to
closed.
be routed
to all
of the
cooler
passages
for
cooling.
Oil
returning to the
engine from
the cooler is routed
b.
Advance throttle
to increase
engine speed to
through
the internally drilled oil passages.
approximately
1000 RPM
c.
Pull mixture
control
knob slowly
and
steadily
11-56.
ENGINE FUEL SYSTEM.
toward the idle cut-off position, observing
tacho-
meter,
then return
control
full IN
(RICH)
position
11-57. DESCRIPTION.
The engine
is equipped
with
before
engine stops.
a carburetor mounted
at the lower side
of the engine. d.
Adjust mixture adjusting
screw at upper end
of
The carburetor
is of the plain-tube
fixed-jet type and
carburetor intake throat
to obtain a slight and
has such features as an enclosed
accelerating pump mentary gain of 25 RPM
maximum at 1000 RPM en-
mechanism, simplified fuel passages to prevent vapor gine speed as mixture control is moved from full IN
locking,
idle cut-off to
prevent starting
of the engine
(RICH) toward
idle cut-off
position. Return
control
accidentally and manual
mixture control for leaning. to full
IN (RICH) to prevent engine stoppage.
For overhaul and repair of the carburetor, refer to e. If mixture is set too LEAN, engine speed will
the manufacturer's
overhaul and repair manual. drop
immediately, thus requiring a richer mixture.
11-22