Cessna T188C - Page 188

MODEL
188
&
T188
SERIES
SERVICE
MANUAL
11A-9.
TROUBLE
SHOOTING.
TROUBLE
PROBABLE
CAUSE
REMEDY
ENGINE
FAILS
TO
START.
Improper
use
of
starting
Refer
to Information
Manual
procedure.
Defective
aircraft
fuel
system.
Refer
to
Section
12.
Spark
plugs
fouled.
Remove
and
clean.
Check
gaps
and
insulators.
Use new
gaskets.
Check
cables
to
persistently
fouled
plugs.
Magneto
impulse
coupling
failure.
Repair
or
install
new
coupling.
Defective
magneto
switch
Repair
or
replace
switch
or
grounded
magneto
leads.
and
leads.
Defective
ignition
system.
Refer
to
paragraph
11-61.
Excessive
induction
air
leaks.
Correct
cause
of
air
leaks.
Dirty
screen
in fuel
control
unit,
Clean
screen.
Replace
defective
or
defective
fuel
control
unit.
fuel
control
unit.
Defective
electric
fuel
pump.
Refer
to
Section
12.
Defective
fuel
manifold
Remove
and
clean.
Replace
if
valve,
or
dirty
screen.
defective.
Clogged
fuel
injection
lines
Clean
lines
and
nozzles.
Replace
or
discharge
nozzles.
if defective.
Fuel
pump
not
permitting
fuel
Replace
engine-driven
pump.
from
auxiliary
pump
to
by-pass.
Vaporized
fuel
in
system.
Refer
to
Information
Manual.
ENGINE
STARTS
BUT
DIES,
Idle
stop
screw
or
idle
mixture
Refer
to
paragraph
11A-37.
OR
WILL
NOT
IDLE.
incorrectly
adjusted.
Propeller
control
set in
high
Use
low pitch
(high
rpm)
position
pitch
position
(low
rpm).
for
all
ground
operation.
Air
leak
in intake
manifold.
Tighten
loose
connections
or
replace
damaged
parts.
Spark
plugs
fouled
by
oil
Top
overhaul
engine.
escaping
past
piston
rings.
Water
in
fuel
system.
Drain
fuel
tank
sumps,
fuel
lines and
fuel
strainer.
Defective
ignition
system.
Refer
to paragraph
11-61.
Dirty
screen
in
fuel
control
unit.
Clean
screen.
Replace
fuel
control
or
defective
fuel
control
unit.
unit
if defective.
Defective
manifold
valve
or
Replace
if defective.
Clean
screen.
clogged
screen.
1A-4