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CS-400
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
mufer body.
• Clean carbon deposits from mufer components.
• Replace screen if it is cracked, or has holes burned
through.
• Assemble components in reverse order.
NOTE
Carbon deposits in mufer will cause drop in engine
output. Spark arrestor screen must be checked
periodically.
AUTOMATIC OILER
• The discharge volume of the automatic oiler is ad-
justed to 4 mL/min approximately at 7000 r/min, prior
to shipment from factory.
• To increase the delivery volume, turn the adjusting
screw counterclockwise. When the screw touches
stopper and stops, this position indicates maximum
discharge volume. (13 to 14 mL/min at 7000 r/min)
• Do not turn the adjusting screw beyond the maximum
or minimum limit of volume adjustment.
Worn : 0.5 mm (0.020 in.)
Groove
Oil hole
Cylinder ns
Spark arrestor screen
Mufer
Screen cover
Adjusting screw
Decrease Increase
Sprocket