CS-400 MAINTENANCE
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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 drop in engine output and
overheating. Spark arrestor screen must be checked periodically.
1. Remove air cleaner cover and
remove spark plug lead.
2. Remove spark arrestor cover (C)
and screen (B) from muffler (A)
body.
3. Clean carbon deposits from
muffler components.
4. Replace screen if it is cracked, or
has holes burned through.
5. Assemble components in reverse order.
Note: When cleaning carbon deposit, be careful not to damage the
catalytic element inside muffler.
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