Honda EU10i Owner's Manual page 24

5. STARTING THE ENGINE
Before starting the engine disconnect any load from the AC receptacle.
1.Turn the fuel cap lever fully clockwise to the ON position.
NOTE:
Turn the fuel cap vent lever to the OFF position when transporting the
generator.
FUEL CAP VENT LEVER
ON
ON
2.Turn the engine switch to the ON position.
ON
ON
ENGINE SWITCH
21