Owner's Manual

27
CS-400F
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 ns will result in poor engine cooling.
• Remove dirt and dust from between ns 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
mufer body.
• Clean carbon deposits from mufer components.
• Replace screen if it is cracked, or has holes burned
through.
• Assemble components in reverse order.
NOTE
Carbon deposits in mufer will cause drop in engine
output. Spark arrestor screen must be checked
periodically.
Worn : 0.5 mm (0.020 in.)
Groove
Oil hole
Cylinder ns
Spark arrestor screen
Mufer
Screen cover
Sprocket
SPARK ARRESTOR MUFFLER
• The spark arrestor mufer controls the exhaust noise
and prevents hot, glowing particles of carbon from
leaving the mufer.
• Make sure the spark arrestor screen is in good repair
and properly seated in the mufer.
• 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.
This requirement also applies to all U.S. Forest Service
lands. In some of these areas, the spark arrestor system
must be certied per USDA Forest Service Regulation
SAE J335.
Check with your local or state authorities for specic
regulations in your area. Failure to follow these require-
ments is a violation of the law.