Honda EM4500CXS Manuel De L'utilisateur page 45

5. SPARK ARRESTER SERVICE
If the generator has been running, the muffler will be very hot.
Allow it to cool before proceeding.
1. Remove the two 5 mm screws, and remove the spark arrester.
5 mm SCREWS
SPARK ARRESTER
2. 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 tears. Replace the spark arrester
if it is damaged.
3. Install the spark arrester in the reverse order of removal.
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SPARK ARRESTER SCREEN