Troubl.
Faib.re
of
.ngin.
to
san.
(5-200 magnetOS only)
POWER
PLANT
ISSUED:
8118n2
PIPER
COMANCHE
SERVICE
MANUAL
TABLE VIIA-ID. TROUBLESHOOTING CHAJtT
(ENGINE) (CAlUIURETOR)
Cawe Remedy
Lade.
of
fuel.
Ch.ck
fu.l
syst.m
for
leW.
Fill
fu.l
WIk
•.
Clean dirty lines.
strainen.
or
fuel coc:a.
UncierpriminJ·
Prim.
with
twO
or
three
sttokes
of
prim.r.
Ovetpriming.
Open
throttl.
and "unload"
•
•••
Incorrect
throttl.
setting.
Op.n
throttle
to
on.·renth
of
its
....
Defective spark plugs. Clean and
adjUSt
or replace
spark plug
or
plugs. Refct
to
Paragraph 7 A·81 for
spark plug
rap
adjuscn.nu.
Defective ignition wire.
Check
Wlth
electric reSter and
replace
any
def.ctiv.
wires.
Improper operation
of
Ch.ck
internal timing of
!napeto
to
breaker points
mqneto.
Ch.ck
points.
Magnetiz.d
impulse couplins D
.........
tiz.
impulse couplings.
left magneto only.
Frozen spark plug electrodes. Replace spark plugs or
dry
out
removed plull"
.\tixture contrOl in idle
cut·
Open mixture control.
off.
Internal failure. Check oil sump
saccn
for meral
parncles. If
found. complete
overhaul
of
the engtne may be
indica.ted.
Broken
contact .pring. Replace capacitor.
Improper switch wiring for Reverse magneto switch wires
left
magn.to
.tamng.
Shorted ianition switch
or
Check and replace or repair.
loose ground.
2
fa
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