Honda GX240 Owner's Manual page 31

6. Carburetor adjustment
1. Start the engine and allow it to warm up to normal operating
temperature.
2. With the engine idling, turn the pilot screw in or out to the setting that
produces the highest idle
)
rpm. The correct setting will usually be:
Dual-element, SingleTelement and Oil Bath Air Filter: GX240-2 l/2;
GX340-2 l/4 turns out cyclone Air Filter: GX240-2 turns out;
GX340-2 l/2 turns out.
CAUTION: Do not tighten the pilot screw against its seat; this will damage
the. pilot screw or seat.
PILOT SCREW
3. After the pilot screw is correctly adjusted, turn the throttle stop screw
to obtain the standard idle speed.
Standard idle speed: 1400 + 150 rpm.
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