Honda GX120 Owner's Manual page 18

OPERATION
SAFE OPERATING PRECAUTIONS
Before operating the engine for the first time, please review the
IMPORTANT SAFETY INFORMATION on page 5 and the chapter titled
BEFORE OPERATION.
Carbon monoxide gas is toxic.
Breathing it can cause
unconsciousness and even kill you.
Avoid any areas or actions that
expose you to carbon monoxide.
Review the instructions provided with the equipment powered by this
engine for any safety precautions that should be observed in
conjunction with engine startup, shutdown, or operation.
STARTING THE ENGINE
1.
Move the fuel valve lever to the
ON position.
FUEL VALVE
LEVER
15