Piper PA-24 Comanche Service Manual page 331

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PIPER COMANCHE SERVICE MANUAL
TABLE
VUoIU.
TROUBLESHOOTING
CHART
(ENGINE) (coat)
Trouble Cauae Remedy
Failure of engine to Throttle lever OUt of AdjUSt throttle
\ever.
develop full power. adjustment.
Leak in induction system.
Tilhten all cOMeroons, and
replace defective pUts.
Ramction in carbu.n:tor Examine air scoop and re-
air scoop. move restriction.
Improper fuel.
Fill tank with recommended
fuel.
Propeller pemor put OUt Adjust ,ovcmor.
of adjustment.
Faulty ipition. Tipten all connections.
Check system. Check ignitIon
timin,.
Rou,h runNnI engine.
Cracked engine
moUDts.
Repair or repalce engine mount.
Unbalanced propeller.
Remove propeller and have it
checked for balance.
Bent propeller blades.
Check propeller for track.
Defective mounOnI.
Install neW mountilll bushings.
Lead depOsit on spark Clean or replace pluJS.
plul'
Malfunctionin( CJ1Iifte.
Check entift engine.
L.ow oil pressure. Insufficient oil. Check oil supply.
Dirty oil
SCI'ftIlS.
Remove and clean oil screens.
Defective pressure Pic. Replace gqe.
Air lock or dirt
in
relief Remove and clean oil pressure
valve. relief valve.
Leak in suction line or Check psket between accessory
pressure line. housing crankcase.
Hilh oil tempCftNfC ..
Sec "High Oil Temperature"
in Trouble Column.
Stopp.,e in oil pump intake
Check line for obstruction.
pasu.ge. Check suction screen.
Worn or scored bearinJS. Overhaul.
POWER PLANT
ISSUED: 8/18/72
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