Lycomin 0-360 - Fuel Mixture Leaning and Carburetor Heat

TEXTRON LYCOMING
OPERATOR'S
MANUAL
0-360
and ASSOCIATED
MODELS
SECTION
3
I)o
not manually lean engines equipped
with automatically controlled
fuel system.
On engines with
manual mixture
control,
maintain mixture
control in
"Full Rich" position for rated take-off, climb and maximum cruise powers
(above approximately
75%).
However,
during take-of
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. Rough operation
due to over-rich fuel/air
mixture is most likely to be
encountered
in carbureted engines
at altitude above 5,000 feet.
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
carbureted
or
fuel injected engines
to obtain
smooth
operation.
On turbocharged
engines
never exceed
1650 F.
turbine inlet
temperature
(TIT).
1. LEANING
TO EXHAUST
GAS TEMPERATURE
GAGE.
a. Normally
aspirated engines
with fuel
injectors or uncompensated
carburetors.
(I) Maximum
Power Cruise
(approximately
75% power)
- Never lean
beyond
150°F. on rich side of peak
EGT unless aircraft operator's
manual
shows otherwise. Monitor
cylinder head temperatures.
(2) Best Economy
Cruise
(approximately
75% power
and below)
-
Operate at peak EGT.
b.
Turbocharged
engines.
(I) Best
Economy
Cruise - Lean
to peak turbine
inlet temperature
(TIT)
or 1650°F.,
whichever
occurs
first.
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