Cessna 177 SERIES Service Manual

b.
Check breaker
contact
assembly
points
NOTE
for
excessive
wear,
burning,
deep
pits
and carbon
deposits.
Breaker
points
may be
cleaned
with a
An absence
of
rpm drop
may be
an indication
hard finish
paper.
If breaker points
are found
de-
of
faulty grounding
of one
side of the
ignition
fective,
install a new assembly.
Make
no attempts
system,
a disconnected
ground lead
at mag-
to stone
or dress
breaker
points.
Clean new
breaker
neto or
possibly
the magneto
timing
is set too
points
with clean unleaded
gasoline
and hard finish
far
in advance.
paper before
installing.
c. Check
condition
of
the
cam
follower
felt.
11-65.
SPARK
PLUGS.
Two
18-mm
spark
plugs
are
Squeeze
felt
between
thumb
and finger.
If fingers
are
installed
in
each
cylinder
and screw
into helicoil
type
not
moistened
with
oil,
re-oil
using
2 or
3 drops
of
thread
inserts.
The spark
plugs
are
shielded
to
pre-
lubricant
(Bendix
Part
No.
10-86527
or
equivalent).
vent spark
plug
noise
in the
radios
and
have an
inter-
Allow
approximately
30 minutes
for felt
to
absorb
nal resistor
to provide
longer
terminal
life.
Spark
the
lubricant.
Blot off
excess
lubricant
with
a clean,
plug
life
will vary
with
operating
conditions.
A spark
lint-free
cloth.
Too
much
lubricant
could
foul
break-
plug
that
is kept
clean
and
properly
gapped
will
give
er points
and
cause
excessive
burning.
better
and
longer
service
than
one that
is allowed
to
d. BENDIX
S-1200
SERIES.
Check
capaci-
collect
lead
deposits
and
is improperly
gapped.
tor
mounting
bracket
for
cracks
or
loosening.
If
equipment
is
available,
check
the
capacitor
for leak-
NOTE
age,
series
resistance
and
capacitance.
The
capaci-
tance
should
be at least
0.30
microfarads.
Refer
to Section
2
for inspection
interval.
At
e.
BENDIX
D-2000
(DUAL)
SERIES.
Check
each
inspection,
remove,
clean,
inspect
and
capacitors
for
looseness
in the
magneto
cover
of the
regap
all
plugs.
Install
lower
spark
plugs
in
harness
assembly
and for
any physical
damage.
If
upper
portion of
cylinders
and install
upper
equipment
is available,
check the
capacitors for
spark plugs in
lower portion
of cylinders.
leakage,
series
resistance
and capacitance.
The
Since
deterioration
of lower
spark plugs
is
capacitance
should
be 0.34 to
0.41 microfarads.
usually
more
rapid
than that
of upper
spark
plugs,
rotating
helps
prolong
spark
plug
life.
NOTE
11-66.
ENGINE
CONTROLS.
Spring
in capacitor
outlet
may cause
an
indi-
cation
of
a short
to
ground
if
an
adapter
lead
11-67.
DESCRIPTION.
The
throttle,
mixture,
is
not
used.
propeller
and
carburetor
heat
controls
are
of the
push-pull
type.
The
propeller
control
is equipped
f. If
the trouble
has
not
been
corrected
to lock
in any
position
desired.
To
move
the control,
after
accomplishing
the
moisture
and
breaker
con-
the
spring-loaded
button,
located
in the
end
of the
tact
compartment
check,
check
magneto-to-engine
control
knob,
must
be
depressed.
When
the
button
timing
in
accordance
with
paragraph
11-62.
If
tim-
is released,
the
control
is locked.
The
propeller
ing
is incorrect,
remove
magneto
and adjust
inter-
control
also
has
a vernier
adjustment.
Turning
the
nal
timing
in
accordance
with
paragraph
11-60.
control
knob
in either
direction
will
change
the
con-
g. Reinstall
magneto
and
time
to engine
in
trol
setting.
The
vernier
is
primarily
for
precision
accordance
with
paragraph
11-62.
control
setting.
The
throttle
control
has
neither
a
h.
If the trouble
has
not been
corrected,
locking
button
nor
a vernier
adjustment,
but
con-
magneto
overhaul
or
replacement
is indicated.
tains
a knurled
friction
knob
which
is rotated
for
more
or
less
friction
as
desired.
The
friction
knob
11-64.
MAGNETO
CHECK.
prevents
vibration
induced
"creeping"
of
the
control.
a. Start
and
run engine
until
the
oil
and
cylinder
The
carburetor
heat
control
has
no locking
device.
head
temperatures
are
in the
normal
operating
The
mixture
control
has
no
locking
device
thru
air-
ranges.
craft
serial
17702539.
Beginning
with
aircraft
serial
b.
Advance
engine
speed
to 1800
rpm.
17702540
the
mixture
control
is
equipped
with
a lock
c.
Turn
the
ignition
switch
to
the "R"
position
and
and
vernier
adjustment
as described
for
the propeller
note
the
rpm
drop,
then
return
the
switch
to
the
control.
"BOTH"
position
to clear
the
opposite
set
of plugs.
d.
Turn
the
switch
to
the "L"
position
and
note
the
NOTE
rpm
drop,
then
return
the switch
to the
"BOTH"
position.
Some
controls
have
intricate
parts
that
will
e.
The
rpm
drop
should
not
exceed
150
rpm
on
fall
out
and
possibly
be lost
if
the
control
is
either
magneto
or
show
greater
than
50
rpm
differ-
pulled
from
the
housing
while
it is
discon-
ential
between
magnetos.
A
smooth
rpm
drop-off
nected.
past
normal
is usually
a sign
of
a too
lean
or too
rich
mixture.
A
sharp
rpm
drop-off
past
normal
is
11-68.
RIGGING.
When
adjusting
any
engine
control,
usually
a
sign
of a
fouled
plug,
a
defective
harness
it
is important
to check
that
the
control
slides
smooth-
lead
or a
magneto
out
of time.
If
there
is
doubt
con-
ly throughout
its
full
travel,
that
it locks
securely
if
cerning
operation
of
the
ignition
system,
rpm
checks
equipped
with
a
locking
device
and
the
arm
or lever
at a
leaner
mixture
setting
or at
higher
engine
speeds
which
it operates
moves
through
its
full
arc
of travel.
will
usually
confirm
whether
a deficiency
exists.
Change
6
11-27

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)