Piper COMANCHE PA-24-180 Service Manual page 392

PIPER COMANCHE SERVICE MANUAL
TABLE VIIA-III. TROUBLESHOOTING CHART
(ENGINE) (CARBURETOR) (cont)
Cause
Trouble
Remedy
Failure of engine to
develop full power
Throttle lever out of
adjustment.
Leak in induction system.
Restriction in carburetor
air scoop
Improper fuel.
Propeller governor put
out of adjustment.
Faulty ignition.
Adjust throttle lever.
Tighten all connections. and
replace defective parts
Examine air scoop and remove
restriction
Fill tank with recommended
fuel.
Adjust governor.
Tighten all connections
Check system. Check
ignition timing.
Rough running engine
Cracked engine mounts.
Unbalanced propeller.
Bent propeller blades.
Defective mounting.
Lead deposit on spark
plug
Malfunctioning engine
Repair or replace engine
mount.
Remove propeller and have
it checked for balance
Check propeller for track
Install new mounting
bushings
Clean or replace plugs
Check entire engine
Lou oil pressure
Insufficient oil
Dirty oil screens.
Defective pressure gage
Air lock or dirt in relief
valve
Leak in suction line or
pressure line
High oil temperature.
Stoppage in oil pump intake
passage.
Worn or scored bearings
2E10
Check oil supply
Remove and clean oil
screens
Replace gage
Remove and clean oil pres-
sure relief valve.
Check gasket between
accessory housing crank-
case.
See "High Oil Temperature"
in Trouble Column
Check line for obstruction
Clean suction screen
Overhaul.
POWER PLANT
ISSUED: 8/18/72