Honda GX610 Owner's Manual page 14

CONTROLS & FEATURES
Choke Knob
The choke knob opens and closes the choke valve in the carburetor.
The CLOSED position enriches the fuel mixture for starting
a cold
engine.
The OPEN position provides the correct fuel mixture for operation
after starting, and for restarting a warm engine.
Some engine applications use a remotely-mounted choke control
rather than the engine-mounted choke knob shown here. Refer to the
instructions provided with the equipment powered by this engine for
remote control information.
CHOKE KNOB
CLOSED
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