19
SPARK ARRESTER (applicable types)
The spark arrester must be serviced every 100 hours to keep it
functioning as designed.
If the engine has been running, the muffler will be hot. Allow it to cool
before servicing the spark arrester.
Spark Arrester Removal
1. Loosen the socket bolt, then remove the top cover.
2. Remove the 4×6 mm self-tapping screws from the spark arrester, and
remove the spark arrester and exhaust filter (UMC435 only) from the
muffler.
Exhaust Filter Cleaning & Inspection (UMC435 only)
Pinch the exhaust filter, and strike it lightly with a finger, to remove
carbon deposits. Be careful not to strike it too hard. The exhaust filter
must be free of breaks and holes. If it is damaged or fouled excessively,
replaced it.
SPARK PLUG
MUFFLER
4×6 mm
SELF-TAPPING
SCREWS
(UMC435 [3])
(UMC425 [2])
SPARK ARRESTER’S
OUTLET
SPARK ARRESTER
EXHAUST FILTER
(UMC435 only)
(UMC435 only)
Spark Arrester Cleaning & Inspection
1. 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.
2. Install the exhaust filter (UMC435 only) and spark arrester in the
reverse order of disassembly.
When you install the spark arrester, the spark arrester’s outlet must
point the opposite side of the spark plug.
3. Install the top cover, and tighten the socket bolt securely.
31VP86080.fm 19 ページ ２０２３年１０月５日 木曜日 午後２時２２分
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