Cessna 177 SERIES Service Manual

11-56.
TROUBLE
SHOOTING.
TROUBLE
PROBABLE
CAUSE
REMEDY
0
ENGINE
FAILS
TO
START.
Defective
ignition
switch.
Check
switch
continuity.
Replace
if defective.
Spark
plugs
defective,
improperly
Clean,
regap
and
test
plugs.
gapped
or fouled
by
moisture
or
Replace
if defective.
deposits.
Defective
ignition
harness.
If
no defects
are
found
by a
visual
inspection,
check
with
a harness
tester.
Re-
place
defective
parts.
Magneto
"P"
lead
grounded.
Check
continuity.
"P"
lead
should
not
be grounded
in the
ON position,
but
should
be
grounded
in OFF
position.
Repair
or
replace
"P"
lead.
Failure
of impulse
coupling.
Impulse
coupling
pawls
should
engage
at
cranking
speeds.
Listen
for loud
clicks
as
impulse
couplings
operate.
Remove
magnetos
and
determine
cause.
Replace
defective
magneto.
Defective
magneto.
Refer
to paragraph
11-63.
Broken
drive
gear.
Remove
magneto
and
check
mag-
neto
and
engine
gears.
Replace
defective
parts.
Make sure
no
pieces
of damaged
parts
remain
in
engine
or engine
disassembly
will be
required.
ENGINE
WILL
NOT
Spark
plugs
defective,
im-
Clean,
regap
and
test
plugs.
IDLE
OR
RUN
PROPERLY.
properly
gapped
or
fouled
Replace
if defective.
by moisture
or
deposits.
Defective
ignition
harness.
If no
defects
are
found
by
a
visual
inspection,
check
with
a harness
tester.
Replace
defective
parts.
Defective
magneto.
Refer
to
paragraph
11-63.
Impulse
coupling
pawls
Listen
for
loud clicks
as
impulse
remain
engaged.
coupling
operates.
Remove
magneto
and
determine
cause.
Replace
defective
magneto.
Spark
plugs
loose.
Check
and
install
properly.
11-20
Change
2

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)