Echo CS-301, Instruction Manual, Page: 19 / 28

19
spRoCket
• A damaged sprocket (J) will cause premature damage
or wear of saw chain.
- When the sprocket has worn out 0.5mm (.020”) or
more, replace it.
• Check sprocket when you install new chain. Replace it
if worn.
• Clean sprocket, clutch and bar mount area before instal -
lation of bar.
IMPORTANT
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.
• Check periodically
• Gap = 0.65mm (.026 in.)
• Replace if either electrode is worn, or if the insulator is
fouled by oil or other deposits.
• Torque = 150 – 170 kg*cm (130 – 150 in. lb.)
IMPORTANT
Do not over-torque
spaRk pluG
Worn : 0.5 mm
J
G
H
J
GuiDe baR anD oil holes
• Clean after each use
- Clean the grooves (G) of the guide bar with a small
screwdriver.
- Clean oil holes (H) with a wire.
• Reverse guide bar periodically.