Honda EU3000is Owner's Manual page 54

SERVICING YOUR GENERATOR
6.Remove the three 5 mm bolts, and remove the exhaust tail pipe and
the spark arrester.
5 mm BOLTS
7.Use a brush to remove carbon deposits from the spark arrester
screen.
Be careful to avoid damaging the screen.
The spark arrester must be free of breaks and holes. Replace the
spark arrester if it is damaged.
8.Install the spark arrester and the exhaust tail pipe in the reverse order
of removal.
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EXHAUST TAIL PIPE
SPARK ARRESTER