Honda GX22 Owner's Manual page 8

ENGINE SAFETY
Hot Exhaust
The muffler becomes very hot during operation and remains hot for a
while after stopping the engine. Be careful not to touch the muffler
while it is hot. Let the engine cool before storing it indoors.
Carbon Monoxide Hazard
Exhaust gas contains poisonous carbon monoxide. Avoid inhalation of
exhaust gas. Never run the engine in a closed garage or confined area.
Other Equipment
Review the instructions provided with the equipment powered by this
engine for any additional safety precautions that should be observed
in conjunction with engine startup, shutdown, operation, or protective
apparel that may be needed to operate the equipment.
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