Piper Cherokee Six - Page 393

PIPER
CHEROKEE
SIX
SERVICE
MANUAL
TABLE
VII-11.
ENGINE
TROUBLESHOOTING
(cont.)
Trouble
Cause
Remedy
Failure
of
engine
to
idle
properly.
(cont.)
Faulty
ignition
system.
Check
entire
ignition
system.
Open
primer.
Improper
spark
plug
setting
for
altitude.
Dirty
air
filter.
Insufficient
fuel
pressure.
Lock
primer.
Check
spark
plug
gap.
Clean
or
replace.
Adjust
fuel
pressure.
Low
power
and
uneven
I
running.
Mixture
too
rich:
indi-
cated
by
sluggish
engine
operation.
red
exhaust
flame
(at
night)
and
black
smoke
in
extreme
cases.
Check
primer.
Read-
justment
of
carburetor
indicated.
Mixture
too
lean:
indi-
cated
by
overheating
or
backfiring.
Leaks
in
induction
system.
Defective
spark
plugs.
Improper
grade
of
fuel.
Magneto
breaker
points
not
working
properly.
Defective
ignition
wire.
Defective
spark
plug
terminal
connectors.
Check
fuel
lines
for
dirt
or
other
restrictions.
Check
fuel
supply.
Read-
justment
of
carburetor
is
indicated.
Tighten
all
connections.
Replace
defective
parts.
Clean
and
gap
or
replace
spark
plugs.
Fill
tank
with
recom-
mended
grade.
Clean
points
and
check
in-
ternal
timing
of
magneto.
Check
wire
with
electric
tester.
Replace
defective
wire.
Replace
connectors
on
spark
plug
wire.
POWER
PLANT
Revised:
11/4/83
2F21