Honda EG3600CX Owner's Manual page 23

Electric starting
When starting the generator after adding fuel for the first time, after
long-term storage, or after running out of fuel, turn the fuel valve
lever to the ON position, then wait for 10 to 20 seconds before
starting the engine.
1. Turn the fuel valve lever to the ON position.
FUEL VALVE LEVER
(CXS type)
O O
ON
N N
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