LYCOMING OPERATOR’S MANUAL
SECTION 6
IO-320 SERIES
TROUBLE-SHOOTING
SECTION 6
TROUBLE-SHOOTING
Experience has proven that the best method of trouble-shooting is to decide on the various causes of the
given trouble and then to eliminate causes one by one, beginning with the most probable. The following
charts list some of the more common troubles, which may be encountered in maintaining engines; their
probable causes and remedies.
1. TROUBLE-SHOOTING – ENGINE.
TROUBLE
PROBABLE CAUSE
REMEDY
Failure of Engine to Start
Lack of fuel
Check fuel system for leaks. Fill
fuel tank. Clean dirty lines,
strainers or fuel valves.
cranking for a few seconds. Turn
ignition switch on and proceed to
start in a normal manner.
Defective spark plugs
Clean and adjust or replace spark
plugs.
Defective ignition wire
Check with electric tester, and
replace any defective wires.
Defective battery
Replace with charged battery.
Improper operation of magneto
breaker
Clean points. Check internal
timing of magnetos.
Lack of sufficient fuel flow
Disconnect fuel line and check
fuel flow.
Water in fuel injector
Drain fuel injector and fuel lines.
Internal failure
Check oil screens for metal
particles. If found, complete
overhaul of the engine may be
indicated.
6-1
Summary of Contents for AIO-320
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