Lycoming AIO-320, Руководство оператора

Страница: 52 / 83

LYCOMING OPERATOR’S MANUAL SECTION 5
IO-320 SERIES MAINTENANCE PROCEDURES
c. Fuel Grades and Limitations –
The recommended aviation grade fuel for the subject engines is listed
in Section 3, Item 9.
In the event that the specified fuel is not available at some locations, it is permissible to use higher
octane fuel. Fuel of a lower octane than specified is not to be used. Under no circumstances should
automotive fuel be used (regardless of octane rating).
NOTE
It is recommended that personnel be familiar with latest revision of Service Instruction No.
1070 regarding specified fuel for Lycoming engines.
d. Air Intake Ducts and Filter –
Check all air intake ducts for dirt or restrictions. Inspect and service air
filters as instructed in th
e. Idle Speed and Mixture Adjustment –
(1) Start the engine and warm up in the usual manner until oil and cylinder head temperatures are
normal.
normal, proceed with idle adjustment.
(3) Set throttle stop screw so that the engine idles at the airframe manufact
RPM. If the RPM changes appreciably after making idle mixture adjustment during the
succeeding steps, readjust the idle speed to the desired RPM.
(4) When the idling speed has been stabilized, move the cockpit mixture control lever with a smooth,
achometer for any change during
the leaning process. Caution must
position before the RPM can drop to a point where the engine cuts out. An increase of more than
rich idle mixture. An immediate decrease in
RPM (if not preceded by a momentary increase) indicates the idle mixture is too lean.
If step (4) indicates that the idle adjustment is too rich or too lean, turn the idle mixture
adjustment in direction required for correction, and check this new position by repeating the above
procedure. Make additional adjustments as necessary until a check results in a momentary pick-up
of approximately 50 RPM. Each time the adjustment is changed, the engine should be run up to
2000 RPM to clean the engine before proceeding with the RPM check. Make final adjustment of
the idle speed adjustment to obtain the desired idling RPM with closed throttle. The above method
aims at a setting that will obtain maximum RPM with minimum manifold pressure. In case the
setting does not remain stable, check the idle linkage; any looseness in this linkage would cause
erratic idling. In all cases, allowance should be made for the effect of weather conditions and field
altitude upon idling adjustment.
3. LUBRICATION SYSTEM.
a. Oil Grades and Limitations –
Service the engine in accordance with the recommended grade oil as
specified in Section 3, Item 8.
5-5