Piper Warrior III - Page 843

PIPER AIRCRAFT, INC.
PA-28-161, WARRIOR III
MAINTENANCE MANUAL
PAGE 3
Nov 30/06
4J1
71-00-00
CHART 1 (Sheet 2 of 5)
TROUBLESHOOTING ENGINE
Trouble Cause Remedy
Failure of engine to idle Leak in the induction system. Tighten all connections in
properly. (cont.) the induction system.
Replace any parts that are
defective.
Low cylinder compression. Check cylinder compression.
Faulty ignition system. Check entire ignition system.
Open primer. Lock primer.
Improper spark plug setting for Check spark plug gap.
altitude.
Dirty air filter. Clean or replace.
Low power and uneven running Mixture too rich; indicated by Check primer. Readjust
engine. sluggish engine operation, red carburetor as required.
exhaust flame and black smoke.
Mixture too lean, indicated by Check fuel lines for dirt or
overheating or backfiring. other restrictions. Check
fuel supply.
Leaks in induction system. Tighten all connections.
Replace defective parts.
Defective spark plugs. Clean or replace spark plug.
Defective thermostats. Replace.
Defective temperature gauge. Replace gauge.
Excessive blow-by. Usually caused by weak or
stuck rings. Top overhaul
engine.
Improper engine operation. Check entire engine.
Improper grade of fuel. Fill tank with recommended
fuel grade.
Magneto not working properly. Check magneto timing.
Defective ignition wire. Check wire with electric
tester. Replace defective wire.
Defective spark plug terminal Replace connectors on
connectors. spark plug wire.
Restriction in exhaust system. Check for loose muffler
baffles.
Improper ignition timing. Check magnetos for timing
and synchronization.