
Trouble
Cause
Remedy
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 blade track.
Defective mounting.
Install new mounting bushings.
Lead deposit on spark plug.
Clean or replace plugs.
Malfunctioning engine.
Check entire engine.
Low oil pressure.
Insufficient oil.
Check oil supply.
Dirty oil screens.
Remove and clean oil screens.
Defective pressure gauge.
Replace gauge.
Air lock or dirt in relief
Remove and clean oil pressure
valve.
relief valve.
Leak in suction line or
Check gasket between
pressure line.
accessory housing crankcase.
High oil temperature.
See "High Oil Temperature"
in Trouble Column.
Stoppage in oil pump
Check line for obstruction.
intake passage.
Clean suction screen.
Worn or scored bearings.
Overhaul.
High oil temperature.
Insufficient air cooling.
Check air inlet and outlet for
deformation or obstruction.
Insufficient oil supply.
Fill oil sump to proper level.
Clogged oil lines or screens.
Remove and clean oil screens.
PIPER AIRCRAFT
PA-28-161 CADET
AIRPLANE MAINTENANCE MANUAL
Issued: FEBRUARY. 28, 1989
POWER PLANT
1K18
TABLE Vlll-ll. ENGINE TROUBLESHOOTING CHART (cont)