WARNING
WHEN ADJUSTING THE FUEL NEEDLE DO NOT TOUCH THE ENGINE
HOUSING. THE HOUSING HEATS UP QUICKLY TO A TEMPERATURE WHICH
CAN CAUSE SERIOUS BURNS IF TOUCHED.
3. Using a small regular tip screwdriver, slowly rotate the Fuel Needle clockwise then counter-
clockwise.
Listen to the sound of the engine and adjust the Carburetor Fuel Needle to the setting where the
engine is running smoothest and strongest. This setting should be the correct Fuel Needle setting.
4. Depress the Formulation Button.
5. If the engine stops or hesitates, immediately release the Formulation Button and rotate the Fuel
Needle counterclockwise 1/16th turn or less. Repeat steps 4 and 5 until the engine no longer hesitates or
stops when beginning to fog.
ADJUSTING THE METERING LEVER
The Metering Lever setting affects how easy the machine is to start. When the Metering lever is
properly set, it allows the proper amount of gasoline to flow through the Carburetor for starting. However,
if the Metering Lever is not set properly the Metering Diaphragm may push too far or too little on the
Metering Lever allowing too much or too little gasoline into the engine.
If the Metering Lever is set too far in, the movement of the Metering Diaphragm will not be sufficient
to open the Inlet Needle Valve the required amount. This will make the engine hard to start because it will
not be getting enough gasoline.
If the Metering Lever is set too far out, the movement of the Metering Diaphragm will open the Inlet
Needle Valve too far. This will make the engine hard to start because it will be getting too much gasoline.
A Metering Lever set too low will decrease the volume of gasoline held in the Metering Chamber.
This will force the Fuel Needle to be set more than ¾ of a turn from STOP to compensate for less
gasoline in the Metering Chamber.
A Metering Lever set too far out will increase the volume of gasoline held in the Metering Chamber.
This will force the Fuel Needle to be set at less than ½ turn from STOP.
If the internal Carburetor parts are replaced or removed it is a good idea to check the Metering
Lever adjustment. The Metering Lever is adjusted in relationship to the circuit plate as shown in the
Metering Lever Adjustment Diagram (Fig. 8).
Be careful that the Metering Lever tip is not set farther out than 0.031" (0.787mm), since this will
cause the gasoline passageway through the Carburetor to remain open all the time. A setting of more
than 0.031" will cause the machine to flood and be impossible to clear. After adjusting the Metering Lever
be sure to readjust the Fuel Needle.
FIGURE 8
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