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 TM 10-3930-644-14&P
H. ADJUSTMENT
1. Choke Adjustment.
a. Loosen clamp and disconnect air cleaner
hose from carburetor.
b. Push choke control knob all the way in
and check position of choke valve.
c. If choke butterfly valve is not completely
open, adjust as follows:
d. Loosen clamp screw on choke bracket.
Loosen lock screw at choke shaft block.
e. Move choke lever to place butterfly valve
in full open position. Tighten lock screw
on control wire and clamp screw on
bracket.
Figure 4-9. Carburetor Adjustments
f. Move control knob in and out several
times to check for smooth operation.
2. Idle Adjustment.
g. If control appears to be overly stiff, check
a. With engine at operating temperature,
for tight bends, over clamping or
release accelerator to allow engine to run
corrosion.
at idle speed. Turn, idle adjusting needle
(Figure 4-9) counterclockwise until engine
h. After choke is adjusted, install air cleaner
begins to falter. Turn needle clockwise
hose on carburetor and tighten clamps
until engine runs smoothly.
3. Governor Adjustment.
Refer to TOPIC 8
GOVERNOR for governor adjustment.
R-123-1
3-65
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