Cessna R182 - Page 142

SECTION
7
AIRPLANE & SYSTEMS
DESCRIPTIONS
CESSNA
MODEL
R'182
loqated
on the
left switch and control
panel.
The switch is labeled
clgc$:
wise,
OFF,
R, L, BOTH,
and
START. The engine shouldbe
operatedopboth
magnetos
(BOTH
position)
except for magneto
checks.
The R and
L
positions
are
for checking
purposes
and
emergency
use only. When the
switch is rotated to the spring-loaded
START
position (with
the,inaster
switch
in
the ON
position),
the
starter contactor is
energized and the
starter
will
crank
the engine. When the
switch
is'released,
itwill
automati-
cally,return to the
BOTH
position.
AIR INDUCTION SYSTEM
The
engine
air
induction
system
receives ram
air through
an
intake
scoop in the upper
left hand,engine cowling. The
intake scoop iscoveredrby
an,air filterrwhich
removes dust and other foreign
matter from the
induction air.
Airflow
passing
through the filter
enters an airbox. After
passing
through
the airboxr induction air
enters
the
inlet in thecarburetor
which,is
belowrthe
engine, and
is
then ducted to
the engine cylinders
through intake manifold tubes. In the event
carburetor ice
-is
encouritered
or the intake
ilter becomes blocked,
alternate heated air
can be obtained
f rom a shroud
around the left muffler
through a
duct to a valve, in the
airbox,,operated b5r-,the carburetor heat control
on the instrument
panel.
Heated air from the
muffler
shroud is obtained from
unfiltered air inside
the cowling.
Use
of full carburetor heat at fuII throttle will result in
a loss
of
approximately one
inch of manifold
pressure.
EXHAUST SYSTEM
Exhaust
gas
from
ea,ch cylinder
passes
through ris'er assemblies to
a
muffler and tailpipe on each side of the
engine.
Shrouds are constructed
around the outside
of the mufflers
to form heating
chambers. The left
muffler supplies
heat to the carburetor,
and the right
muffler
supplies
heat
to the
cabin.
CARBURETOR
AND PRIMING
SYSTEM
The
engine
is equipped.with a horizontally-mounted,
up-draft, float-
type, fixed
jet
carburetor mounted
below the
engine adjacent
to
the
firewall. The
carburetor
is equipped with
an enclosed
accelerator
pump,
an
idle
cut-off
mechanism, and a manual mixture
control.
Fuel is
delivered
from the
fuel
s5rstem to the
carburetor by
gravity
flow and
the engine-
driven fuel
pump.
In
the carburetor,
fuel is atomized,
proportionally
mixed
with intake
air,
and delivered
to
the
cSrlinders tJrrough
intake manifold
tubes. The
proportion
of atomized
fuel to air is
controlled, within limits, by
the mixture contiol
located
on
the
lower center
portion
of the instrument
panel.
For easy
starting in cold weather,
the engine is
equipped with
a
7-22
(