Guide Bar; Spark Arrestor Muffler - Echo CS-400 Instruction Manual

Sprocket
worn : 0.5 mm (0.020 in.)
Spark arrestor screen

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 for-
est, 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.
Groove
Oil hole
Cylinder fins
Muffler
Screen cover

GUIDE BAR

• Clean before using.
• Clean the groove of the guide bar with a small screw-
driver.
• Clean oil holes with a wire.
• Reverse guide bar periodically.
• Check sprocket and the clutch and clean the bar
mount area before installation of the bar.
Replace either or both if worn.
SPROCKET
• A damaged sprocket will cause premature damage or
wear of saw chain.
• when the sprocket has worn out 0.5 mm (0.020 in.) or
more, replace it.
• Check sprocket when you install new chain. Replace it
if worn.
CYLINDER FINS
• Check periodically.
• Clogged fins will result in poor engine cooling.
• Remove dirt and dust from between fins to let cooling
air pass easily.
MUFFLER SPARK ARRESTOR
• Remove air cleaner cover and remove spark plug lead.
• Remove spark arrestor screen cover and screen from
muffler body.
• Clean carbon deposits from muffler components.
• Replace screen if it is cracked, or has holes burned
through.
• Assemble components in reverse order.
NOTE
Carbon deposits in muffler will cause drop in engine
output. Spark arrestor screen must be checked
periodically.
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 require-
ments is a violation of the law.
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CS-400