824
2 3
1 THROTTLE ARM
2. IDLE SPEED ADJUSTMENT
3. IDLE
MIXTURE ADJUSTMENT
4. FUEL
SCREEN
5. MIXTURE ARM
6. THROTTLE CONTROL CABLE
7. WASTE-GATE INTERCONNECT
Figure
8A-7.
Fuel Injector
8A-35. 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 smooth, 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 momentary increase)
indicates the idle mixture is too lean.
Issued: 1/3/78
POWER
PLANT - TURBO
LANCE
II SERVICE
MANUAL
2D6
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