Lycoming IVO-540 Series, Operator'S Manual

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LYCOMING OPERATOR’S MANUAL SECTION 3
VO, IVO & TIVO-540 SERIES OPERATING INSTRUCTIONS
c. Fuel Mixture Leaning Procedures –
(1) Carbureted Engines.
All engines are equipped with automatic altitude compensated carburetors and should never be
manually leaned.
(2) Fuel Injected Engines.
Lean mixture as directed in airframe manufacturer’s ha ndbook. When operating with manually
leaned mixture, monitor cylinder head temperatures carefully.
8. ENGINE SHUT-DOWN.
a. Valve sticking problems can be greatly reduced by proper shutdown procedures. Engine shutdown at
high ambient air and cylinder head temperatures can result in carbon formation in the exhaust valve
guides. Therefore, after landing, if cylinder head temperature is 400°F or above and ambient air
temperature is 70°F or above, idle the engine at 2200 RPM until a significant drop in head
temperature is noted before shutdown, at least 40°F. As ambient temperatures increase, it may be
necessary to increase idle time before shutdown.
b. Move mixture control to idle cut-off.
c. When engine stops, turn switches off.
9. ENGINE FLIGHT CHART.
FUEL AND OIL –
Model *Aviation Grade Fuel
VO-540-B Series........................................................................................................... 80/87 octane, minimum
VO-540-C Series....................................................................................................... 100/130 octane, minimum
IVO-540 Series ......................................................................................................... 100/130 octane, minimum
TIVO-540 Series....................................................................................................... 100/130 octane, minimum
* - Refer to the latest revision of Service Instruction No. 1070.
NOTE
Aviation grade 100LL fuels in which the lead content is limited to 2 c.c. per gallon are
approved for continuous use in the above listed engines.
FUEL PRESSURE
Model Max. Min.
VO-540 Series (inlet to carburetor) 8.0 0.5
IVO-540 Series (inlet to fuel injector) 45 20
TIVO-540 Series (inlet to fuel injector) 45 29
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