Echo CS-400 User Manual

27

•  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.

•  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.

•  Check periodically.

•  Clogged fins will result in poor engine cooling.

•  Remove dirt and dust from between fins to let cooling 

air pass easily.

•  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.

Carbon deposits in muffler will cause drop in engine 

output. Spark arrestor screen must be checked 

periodically.

•  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 fins 

Spark arrestor screen

Muffler

Screen cover

Adjusting screw

Sprocket