TEXTRON
LYCOMING OPERATOR'S
MANUAL
SECTION 5
0-540 & 10-540
SERIES
(3)
Set throttle
stop screw so
that the engine
idles at the
aircraft
manufacturer's recommended
idling RPM. If the RPM
changes ap-
preciably
after making idle mixture adjustment
during the succeed-
ing
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 very slow, steady pull
toward the "Idle
Cut-Off" position
and observe the tachometer
for any change dur-
ing the leaning
process. Caution must
be exercised to return the
mixture control
to the "Full Rich" position
before the RPM can
drop to a
point where the engine cuts
out. An increase of more than
35 RPM while "leaning out" indicates and excessively rich idle
mixture.
An immediate
decrease
in RPM (if not
preceded by
a mo-
mentary
increase) indicates
the idle mixture is too
lean.
If the above indicates
that the
idle adjustment
is too rich
or too lean,
turn the idle
mixture adjustment
in the 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
pickup of approximately 10 to 25 RPM. Each time the adjustment is
changed,
the engine should be run
up to 2000 RPM to clear 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 re-
main 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
andLimitations
-Service
the engine in accordance
with
the recommendations shown in Section 3.
b. Oil
Suction and
Oil Pressure Screens
- At each
fifty hours
inspec-
tion remove,
inspect
for metal particles,
clean
and reinstall.
5-10
Revised
January
1999
To Next Page
Loading...
Need help?
General
