Operation In Flight; Fuel Mixture Leaning Procedure; Leaning To Exhaust Gas Temperature Gage - Lycoming IO-320-A1A Operator's Manual

SECTION 3
OPERATING INSTRUCTIONS

7. OPERATION IN FLIGHT.

Fuel Mixture Leaning Procedure.

Never exceed the maximum red line cylinder head temperature limit.
For maximum service life, cylinder head temperatures should be maintained below 435°F
(224°C) during high performance cruise operation and below 400°F (205°C) for economy
cruise powers.
Do not manually lean engines equipped with automatically controlled fuel system.
Maintain mixture control in "Full Rich" position for rated take-off, climb and maximum
cruise powers (above approximately 75%). However, during take-off from high elevation
airport or during climb, roughness or loss of power may result from over-richness. In such a
case adjust mixture control only enough to obtain smooth operation – not for economy.
Observe instruments for temperature rise.
Always return the mixture to full rich before increasing power settings.
Operate the engine at maximum power mixture for performance cruise powers and at best
economy mixture for economy cruise power; unless otherwise specified in the airplane
owners manual.
During let-down flight operations it may be necessary to manually lean uncompensated
fuel injected engines to obtain smooth operation.

1. LEANING TO EXHAUST GAS TEMPERATURE GAGE.

a. Normally aspirated engines with fuel injectors.
LYCOMING OPERATOR'S MANUAL
GENERAL RULES
IO-320 SERIES