Step 4. Operate The Engine; Operation In Flight; Fuel Mixture Leaning - Lycoming IO-360-N1A Installation And Operation Manual

IO-360-N1A Engine Installation and Operation Manual

Step 4. Operate the Engine

DO NOT TAKE-OFF IF ANY OF THE FOLLOWING CONDITIONS ARE
FOUND:
 Engine roughness
 Low, high, or surging rpm or fluctuations
 High, low, or fluctuating oil pressure
 High or low fuel flow
 High manifold pressure
 Low battery charge.
1. Before take-off, monitor the oil pressure, oil temperature, and cylinder head temperature to
make sure all are within their operating ranges (as specified in Appendix A).
2. Keep the mixture at FULL RICH.
3. Make sure that when take-off power is applied smoothly, oil pressure, fuel flow, manifold
pressure, and rpm remain stable.
NOTICE: After 25 hours of operation, change the oil. Examine the oil filter and screen. Refer
to Chapter 12-10 in the IO-360-N1A Engine Service Manual.
4. Examine the air filters every other flight for dirt and be prepared to clean or replace them if
necessary.
5. If the aircraft is flown in dusty conditions, more frequent oil changes are recommended.
Install dust covers over openings in the cowling for additional protection. Refer to the section
"Volcanic Ash" in the "Engine Conditions" chapter in this manual.

Operation in Flight

1. See the aircraft manufacturer's instructions for recommended power settings.
2. Until oil consumption has stabilized after the first 50 hours of flight, cruising is to be done at
65% to 75% power to ensure correct seating of the rings.

Fuel Mixture Leaning

1. For maximum service life, the CHT must be maintained below 435ºF (224ºC) during high
performance cruise operation and below 400ºF (205ºC) for economy cruise powers.
2. Manual leaning can be monitored by exhaust gas temperature indication, fuel flow indication,
and by observation of engine speed and/or airspeed.
3. On engines with manual control, maintain mixture control in the FULL RICH position for
rated take-off, climb and maximum cruise powers (above approximately 75%). However,
during take-off from a high elevation airport or during climb, roughness or loss of power can
occur from over-richness. In such a case, adjust the mixture control only enough for smooth
operation - not for economy. Monitor instruments for temperature rise. Rough operation due
to over-rich fuel/air mixture is most likely to be encountered at altitudes above 5,000 feet.
4. Always return the mixture to FULL RICH before increasing power settings.
© 2016 Avco Corporation. All Rights Reserved
February 2016
NEVER EXCEED THE MAXIMUM RED LINE CHT LIMIT.
Engine Start and Operation
Page 29