Honda EU10i Owner's Manual page 11

Stop the engine before refueling.
Gasoline is extremely flammable and explosive under certain
conditions. Refuel in a well ventilated area with the engine
stopped.
Keep away from cigarette, smoke and sparks when refueling
the generator. Always refuel in a well ventilated location.
Wipe up spilled gasoline at once.
Never connect the different generator models and types.
Never connect a cable other than the receptacle box for parallel
operation.
Connect and remove the receptacle box for
parallel operation with the engine stopped.
For single operation, the receptacle box for
parallel operation must be removed.
A hot exhaust system can cause serious
burns.
Avoid contact if the engine has been
running.
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