Honda WX15 Owner's Manual page 34

4. Spark arrester maintenance (optional part)
In Europe and other countries where the machinery directive
2006/42/EC is enforced, this cleaning should be done by your servicing
dealer.
If the engine has been running, the muffler will be very hot. Allow it
to cool before proceeding.
CAUTION:
The spark arrester must be serviced every 100 hours to maintain its
efficiency.
1. Remove the muffler protector by removing the three 5 mm bolts.
2. Remove the spark arrester from the muffler by removing a screw.
(Taking care not to damage the wire mesh.)
NOTE:
Check for carbon deposits around the exhaust port and the spark
arrester, and clean if necessary.
MUFFLER
ENGINE SWITCH and
OIL ALERT UNIT
32
SCREW
SPARK ARRESTER
MUFFLER PROTECTOR
5 mm BOLTS