Honda WH15XT Owner's Manual page 42

SERVICING YOUR PUMP
4.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.
5.Install the spark arrester, muffler protector, and muffler in the reverse
order of disassembly.
40
SPARK ARRESTER SCREEN