Cessna 177 SERIES Service Manual

11-42. INSTALLATION.
a. Start
and run engine
until
the oil and
cylinder
a. Using
a good
grade
of gasket
sealant,
install
a
head
temperatures
are in
the normal
operating
range.
new gasket
on accessory
housing
adapter
mount
pad.
b.
Check the
magnetos
for proper
operation
in ac-
Note
that one side
of the gasket
is marked
ENGINE
cordance
with paragraph
11-64.
SIDE;
this side
of the
gasket
must be
installed
toward
c. Clear
the engine
by
advancing
the rpm
to approxi-
the engine.
mately
1000,
then retard
the throttle
to the
idle posi-
b. Install
adapter
on mounting
pad and
install
bolts,
tion.
The
engine
rpm should
stabilize
at
600±25.
If
washers
and nut.
Use lockwashers
next to
bolt heads
not,
adjust
the idle speed
screw
IN to increase
and
and nut.
OUT to
decrease
rpm.
c.
Tighten
bolts
and nut
to 75 lb-in.
d. Install
oil
temperature
bulb
in adapter.
NOTE
e.
Install filter assembly
in accordance with
para-
graph
11-38.
An engine
should
idle
smoothly,
without
f. Install
any
components
removed
for
access.
excessive
vibrations.
The
idle speed
should
be
high enough
to maintain
idling
11-43.
OIL
COOLER.
oil
pressure
and
to preclude
any
possi-
bility
of engine
stoppage
in flight
when
11-44.
DESCRIPTION.
The
external
oil cooler
is
the
throttle
is closed.
mounted
on the
firewall.
Flexible
hoses carry
the
oil to
and from
the
cooler.
Cooling
air for
the cooler
d. After
the idle
speed
has stabilized
(600±25
rpm),
is
ducted
from
the upper
right
engine
baffle
to
the
move
the mixture
control
slowly
toward
the IDLE
shroud
covered
oil cooler.
Exhaust
air from
the
CUT-OFF
position
and
observe
the
tachometer
for
cooler
is discharged
into
the engine
compartment.
any
minute
change
during
this
manual
leaning
proce-
At
each
engine
oil change,
drain
the
oil cooler.
dure.
e.
Quickly
return
the mixture
control
to the
FULL
11-45.
ENGINE
FUEL SYSTEM.
RICH position
before the
engine
stops.
f.
A momentary
increase
of
approximately
25 rpm
11-46.
DESCRIPTION.
A single
barrel,
float-type,
while
slowly manually
leaning
the
mixture
is most
up-draft
carburetor is installed
on the engine.
The
desirable,
an increase of more
than 25 rpm
indicates
carburetor
is equipped
with a manual
mixture
control
a rich idle
mixture
and an immediate
decrease
in rpm
and an idle
cut-off. For
repair and
overhaul
of the
(if not preceded
by a
momentary
increase) indicates
carburetor
refer to the manufacturer's
overhaul
and a
lean idle mixture.
repair
manual.
g. If
the idle
mixture
is too
rich, turn
the idle
mix-
ture
adjustment
center
screw
one
or two
notches
in a
11-47.
CARBURETOR.
clockwise
direction
as viewed
from the
aft end
of the
unit,
then repeat
steps
"d"
through
"f."
11-48.
REMOVAL
AND
INSTALLATION.
a. Pull
fuel shut-off
valve
control to
the OFF
posi-
NOTE
tion.
b. Remove
engine
cowling
in accordance
with
para-
After
each
adjustment
to the
idle mixture,
run
graph
11-3.
engine
up to approximately
1800
rpm to
clear
c.
Drain fuel
from strainer
and lines
with strainer
the engine
of excess
fuel and obtain
a correct
drain
control.
idle
speed.
d. Disconnect
throttle and mixture
controls at car-
buretor.
Note
the EXACT
position,
size and
number
h. If the
idle mixture
is
too lean,
turn
the idle
mix-
of washers
and spacers
for
reference
on reinstalla-
ture adjustment
center screw
one
or two notches
in a
tion.
counterclockwise
direction
as viewed
from
the
aft end
e. Disconnect
and cap
or plug
the three
fuel lines
of the
unit, then
repeat
steps "d"
thru "f."
at carburetor.
i.
This method
of adjustment
will
give the
desired
f.
Remove
induction
airbox
in accordance
with
idle rpm.
If the
adjustments
do not
remain
stable,
paragraph
11-53.
check
the throttle
and
mixture
linkage
for evidence
of
g.
Remove
nuts
and washers
attaching
carburetor
wear
and
improper
rigging.
Any
looseness
of
the
to intake
manifold
and
remove
carburetor.
throttle
and mixture
linkage
will
cause
erratic
idling.
h.
Reverse
the preceding
steps for
reinstallation.
In all
cases,
allowance
should
be made
for the
effect
Use
new gaskets between
carburetor, intake mani-
of weather condition
upon idling adjustment.
The re-
fold and
induction airbox.
lation of
the aircraft to
the prevailing wind
direction
i. Rig throttle and mixture controls
in accordance will have an effect
on the propeller load and engine
with paragraphs 11-69
and 11-70. Check carburetor rpm. It is
advisable to make idle adjustments with
throttle arm to idle stop
arm attachment for security
the aircraft crosswind.
and proper safetying at each normal engine inspection
in accordance
with figure 11-5.
11-50. INDUCTION AIR
SYSTEM.
11-49.
IDLE
SPEED
AND MIXTURE
ADJUSTMENTS.
11-51. DESCRIPTION.
Ram
air to the
engine
enters
Since
idle rpm
may be
affected
by idle
mixture
ad-
the
induction
airbox
through
the induction
air filter.
justment,
it may
be necessary
to readjust
idle rpm
From
the induction
airbox
the air is
directed to
the
after
setting the
idle mixture.
inlet of the
carburetor,
mounted
on the
lower
side
of the
engine oil
sump, through
the carburetor
to
the
11-18
Change
3

Cessna 177 SERIES Specifications

General

Manufacturer	Cessna
Engine Type	Piston
Wingspan	35 ft 6 in (10.82 m)
Seating Capacity	4
Number Built	4, 295
Engine	Lycoming O-360
Horsepower	180 hp
Maximum Takeoff Weight	2, 500 lb (1, 134 kg)