LANCE II
SERVICE MANUAL
2
1. THROTTLE ARM
2. IDLE SPEED
ADJUSTMENT
3. IDLE MIXTURE
ADJUSTMENT
4. FUELSCREEN
5. MIXTURE ARM
6. THROTTLE CONTROL CABLE
7. NUT MS20365-1032C
Figure 8-7. Fuel Injector
4. Remove and clean the injector
inlet strainer at the first 25 hours
of operation
and each
50 hour inspection
thereafter. Check
the screen for distortion
or openings
in the
strainer. Replace
for either
of these conditions.
Clean screen assembly
in solvent and
dry
with
compressed air. Damaged strainer O-rings
should be replaced. To install
the screen
assembly,
place
the gasket
on the screen
assembly
and install the
assembly in
the throttle
body and
tighten to
35-40 inch-pounds
torque.
Attach air
inlet elbow
with spacer
and
clamps
(Torque clamps
to 40-50 in. lbs.)
8-21.
ADJUSTMENT OF IDLE
SPEED AND MIXTURE.
a.
Start the engine
and warm up in
the usual manner
until oil and cylinder
head
temperatures
are normal.
The electric fuel
pump must be
"ON" for b, c, d
and e below.
b. Check
magnetos. If
the "mag-drop"
is normal, proceed
with idle adjustment.
c. Set throttle stop
screw so that
the engine idles at
550-600 RPM. If the
RPM changes
appreciably after making
the mixture adjustment during
the succeeding steps, readjust the
idle speed to the desired RPM.
d. When the idling speed has been stabilized, move the cockpit mixture control lever
with a slow smooth and steady pull toward the "Idle-Cut-Off" position and observe the
tachometer for any
change during 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
50 RPM while "leaning out" indicates
an
excessively
rich idle mixture. An immediate decrease
in RPM (if not preceded by
a
momentary increase) indicates the idle mixture is too lean.
Issued: 1/3/78
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