Echo CS-303T

CS-303T MAINTENANCE
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© 10/20 ECHO Incorporated
Sprocket
• A damaged sprocket will cause
premature damage or wear of
saw chain.
• When the sprocket has worn 0.5
mm (0.020 in.) or more, replace it.
• Check sprocket when you install
new chain. Replace it if worn.
Some tree sap and resins are corrosive. Thoroughly wash the guide
bar and sprocket areas after each use, then coat metal parts with light
oil.
Cooling System Cleaning
• Check periodically.
• Clogged fins will result in poor
engine cooling.
1. Remove muffler and starter.
Worn: 0.5 mm (0.020 in.)