MAINTENANCE CS-303T
52 X7503209108
© 10/20 ECHO Incorporated
2. Use compressed air or wooden
tool to remove dirt and dust from
between fins to let cooling air
pass easily.
Spark Arrestor Muffler
• The spark arrestor muffler controls the exhaust noise and prevents hot,
glowing particles of carbon from leaving the muffler.
• Make sure the spark arrestor 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 arrestor.
This requirement also applies to all U.S. Forest Service lands. In some of
these areas, the spark arrestor system must be certified per USDA Forest
Service Regulation SAE J335.
Check with your local or state authorities for specific regulations in your
area. Failure to follow these requirements is a violation of the law.
Spark Arrestor Screen
Carbon deposits in muffler will cause a drop in engine output and
overheating. Spark arrestor screen must be checked periodically.
1. Remove muffler cover.
2. Remove spark arrestor screen
cover, gaskets, and screen from
muffler body.
3. Clean carbon deposits from
muffler components.
Note: When cleaning carbon
deposit, be careful not to
damage the catalytic
element inside muffler.
4. Replace screen if it is cracked, plugged, or has holes burned through.
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