Spark Arrester Muffler - Echo CS-4920 Operator's Manual

MAINTENANCE
3. Loosen the two mounting bolts
(B) on the air cleaner case (C).
4. Lift the cylinder cover (D), up to
access the cleaner case
cushion (E) and remove it from
air cleaner case (C).
5. Use compressed air or a
wooden tool to remove dirt and
dust from between fins to allow
cooling air to pass easily.
6. Assemble the components in
reverse order.
7. Make sure to tighten the two
bolts (B) on air cleaner case
(C).

Spark Arrester Muffler

• The spark arrester muffler controls the exhaust noise and prevents hot,
glowing particles of carbon from leaving the muffler.
• Make sure the spark arrester screen is in good repair and properly seated
in the muffler.
• Certain internal combustion engines operated on forest, brush, and/or
grass-covered areas in the states of Washington, Oregon, Idaho,
California, Minnesota, New Jersey and Maine, are required to be
equipped with a spark arrester.
This requirement also applies to all U.S. Forest Service lands. In some of
these areas, the spark arrester system must be certified per USDA Forest
Service Regulation SAE J335.
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CS-4920
B
B
E
C
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© 09/2022 ECHO Incorporated
C
D