Honda HSM1380i Owner's Manual page 11

Never run the engine in an enclosed or confined area. Exhaust
contains poisonous carbon monoxide gas; exposure can cause loss
of consciousness and may lead to death.
The muffler and engine become very hot during operation and
remains hot for a while after stopping the engine. Be careful not to
touch the muffler and engine while they are hot. Let the engine cool
before storing the snowblower indoors.
Stop the engine and let it cool before operating covers for
inspection and other servicing.
Carefully check the area before backing the snowblower.
To protect your ears, use earplugs while operating the snowblower.
While operating the snowblower, hold the handle firmly and walk,
don't run. Wear suitable winter boots that resist slipping.
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