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SECTION 3
If readjustment becomes necessary, stop the engine,
then turn the MAIN and IDLE fuel adjusting screws all the
way in until they bottom LIGHTLY - don't force them
closed, as this will damage the needle valves.
For preliminary settings, refer to the chart below.
INITIAL CARBURETOR AOJUSTMENT CHART
B-Series
C-Series
0-160
0-200
Main Fuel 1 1/8
2
1 1/8
2
Valve
turns
turns
turns
turns
Idle Valve 1 1/8
1 1/4
1/2· 1
1 1/4
turns
turns
turns
turns
For final adjustments, start engine and allow it to warm
up, then operate at full throttle. Turn MAIN fuel in until
engine slows down (lean side). then out until it slows down
again from overrich setting - note positions of screw at
both settings, then set it about halfway between the two.
The IDLE fuel setting can then be adjusted in the same
manner for smoothest idle. Rough idle is often due to the
idle speed being set too low - check this also.
IDLE VALVE
NEEDLE VALVE
Fig. 3-24 B-Series Carburetor Adjustment
IDLE FUEL ADJUSTMENT
1-1/4
TURNS OPEN--
Fig. 3-25 C-Series Carburetor Adjustment
3-8
MAIN FUEL
(HIGH SPEED)
ADJUSTMENT
THROTTLE
IDLE
STOP
ADJUSTMENT
SCREW
SIDE VIEW
REAR VIEW
Fig. 3-26 0-160 Carburetor Adjustment
MAIN FUEL
ADJUSTMENT
(2 TURNS OPEN)
Fig. 3-27 0-200 Carburetor Adjustment
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