Piper COMANCHE PA-24-180 Service Manual page 331

Falure of enipne to
stan.
PIPER COMANCHE SERVICE MANUAL
TABLE V11411. TROUBLESHOOTING CHART
(ENGINE)
Trouble
I
Came Remedy
Lack of fuel
Underpnming.
Overprimnug.
Incorrect chrottle setin.
Defective spark plugs.
Defective ignition wire.
Check fuel syrem for
leaks.
Fill fuel unk.
Clean dirry lines, sriners,
or fuel cocks.
Prune with two or three
srokes of primer.
Open throttle and "unload"
engine.
Open throttle to one-tenth
of its range.
Clean and adjus or replace
spark plug or plup. Refer
to Puagraph 7-51 for spark
plug gap adjusmcents.
Check wirh electric teter
and replace any defective
wires.
Check unternal timing of
nagneto. Check points.
Demagnetize impulse couplings.
Replace spark plugs or dry our
removed plugs.
Open mixture control.
Check oil sump screen for metal
particles. If found. comple:e
overhaul of the engine mav be
mdicated.
Replace capacitor.
Reverse magneto switch wires
Check and replace or repair
0
Improper operation of
magneto to breaker points.
Magnetized impulse coupling
left magnero only.
Frozen spark plug electrodes.
Mixture control in idle cut-
off.
Internal failure.
(S-200 magnetos only) Broken contact spring.
Improper switch wiring for
left magneto starung.
Shorred ignition switch or
loose ground.
POWER PLANT
ISSUED: 8/18/72
2 B21