Yamaha YP20T Owner's Manual page 7

9 In order to prevent overheating, ensure adequate
airflow by keeping the machine at least 1 m (3 ft)
from objects or other equipment.
745-019a
9 Do not operate the engine with a dust cover or
other objects covering it.
9 When covering the water pump, be sure to do so
only after the engine and muffler have completely
cooled down.
745-020
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