PIPER AIRCRAFT, INC.
PA-28-161, WARRIOR III
MAINTENANCE MANUAL
PAGE 4
Nov 30/06
4J2
71-00-00
CHART 1 (Sheet 3 of 5)
TROUBLESHOOTING ENGINE
Trouble Cause Remedy
Failure of engine to develop Throttle lever out of adjustment. Adjust throttle lever.
full power.
Leak in induction system. Tighten all connections and
replace defective parts.
Restriction in carburetor air scoop. Examine air scoop and
remove restriction.
Improper fuel. Fill tank with recommended
fuel.
Faulty ignition. Tighten all connections.
Check system. Check
ignition timing.
Rough running engine. Cracked engine mount(s). Repair or replace engine
mount(s).
Unbalanced propeller. Remove propeller and have
it checked for balance.
Bent propeller blades. Check propeller blade track.
Defective mounting bushings. 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 oil pressure gauge. Replace gauge.
Air lock or dirt in relief valve. Remove and clean oil
pressure valve.
Leak in suction line Check gasket between
or pressure line. accessory housing and
crankcase.
High oil temperature. See “High Oil Temperature,”
in Trouble column, below.
Stoppage in oil pump Check line for obstruction.
intake passage. Clean suction screen.
Worn or scored bearings. Complete engine overhaul.
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