Piper PA-24 Comanche Service Manual page 390

PIPER COMANCHE SERVICE
MANl'AL
TARLE
VllA~1I1.
TROUBLESHOOTI:"G CHART
(E'GI'E) (CARBU RETOR)
(conn
•
2EIO
ISSl ED. 8/18/72
Trouble Cause
Remedy
Failure of engine to Throttle lever out of
Adjust throttle lever.
develop full power.
adjustment.
Leak in induction system.
Tighten all connections. and
replace defective parts.
Restriction in carburetor Examine air scoop and remove
arr
scoop.
restriction.
Improper fuel.
Fill tank with recommended
fuel.
Propeller governor put Adjust governor,
out of adjustment.
Faulty ignition. Tighten all connections,
Check system. Check
ignition timing,
Rough running engine. Cracked engine mounts. Repair or replace engine
mount.
Unbalanced propeller. Remove propeller and have
it checked for balance,
Bent propeller blades.
Check propeller for track.
Defective mounting.
Install new mounting
bushings.
Lead deposit on spark
Clean or replace plugs.
plug.
Malfunctioning engine. Check entire engine.
Low
oil pressure
Insufficient oil. Check oil supply.
Dirty oil screens. Remove and clean oil
screens.
Defective pressure gage. Replace gage.
Air lock or dirt in relief
Remove and clean oil pres-
valve.
sure relief valve,
Leak in suction line or
Check gasket between
pressure line,
accessory housing crank-
case.
High oil temperature.
See "High Oil Temperature"
, in Trouble Column.
Stoppage in oil pump intake
Check line for obstruction.
passage.
Clean suction screen.
Worn or scored bearings.
Overhaul.
POWER PLA~