SECTION 3 LYCOMING OPERATOR’S MANUAL
OPERATING INSTRUCTIONS IO-320 SERIES
a. Fuel Injected Engines (Cold).
(1) Perform preflight inspection.
(6) Open throttle wide open, move until a slight but steady flow is
noted (approximately 3 to 5 second
(8) Open throttle ¼ of travel.
(9) Set magneto selector switch. (Consult airf
(10) Engage starter.
(12) Move mixture control slowly
(13) Check oil pressure gage. If minimum oil pressure is not indicated within thirty seconds, stop
engine and determine trouble.
b. Fuel Injected Engines (Hot). Because of the fact that the fuel percolates and the system must be
cleared of vapor, it is recommended that the same procedure be used as outlined for cold engine start.
4. COLD WEATHER STARTING. During extreme cold weather, it may be necessary to preheat the engine
and oil before starting.
5. GROUND RUNNING AND WARM-UP.
The engines covered in this manual are air-pressure cooled and depend on the forward speed of the aircraft
to maintain proper cooling. Particular care is necessary, therefore, when operating these engines on the
ground. To prevent overheating, it is recommended that the following precautions be observed.
NOTE
Any ground check that requires full throttle operation must be limited to three minutes, or
less if the indicated cylinder head temperature should exceed the maximum stated in this
manual.
3-2
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