CARBURETOR ADJUSTMENT
IDLE SPEED
ADJUSTING
SCREW
'^j-^
VALVE
MAIN
NEEDLE VALVE
FIGURE
15
Minor carburetor adjustments may be required to compensate for differences in fuel
temperature, altitude and
load.
The carburetor has three simple adjustments:
1.
High Speed Fuel Mixture Adjustment (Main Needle Valve)
2.
Idle Fuel Mixture Adjustment,(Idle Valve)
3. Idle Speed Adjustment.
1,
Initial Adjustment:
A. Turn main needle valve clockwise until it just closes.
Valve may be damaged by turning it in too far.
B. Then open main needle valve 1-1/8 turns counterclockwise. Close idle valve ii
same manner and open 1-1/8 turns, }
This initial adjustment will permit the engine to be started and warmed up
prior to final adjustment. :
-22-
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