Worn : 0.5 mm
D
Maintenance, continued
SPROCKET
■
A damaged sprocket (C) will cause premature damage or wear of
saw chain.
■
C
Clean sprocket, clutch and bar mount area before installation of bar.
■
Check sprocket when you install new chain. When outer diameter
of sprocket is worn 0.5mm (.020") or more, replace it.
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.
SPARK PLUG
■
Check periodically.
IMPORTANT: Use only NGK BPM-8Y spark plug (BPMR-8Y in
Canada) otherwise severe engine damage may occur.
1.
Remove air cleaner cover.
2.
Remove spark plug lead and spark plug.
3.
Gap = 0.65 mm (0.026 in)
4.
Replace if electrode is worn, or if the insulator is fouled by oil or
other deposits
5.
Torque = 150 – 170 kg/cm (130 – 150 in. lb.)
IMPORTANT Do not over-torque
COOLING SYSTEM CLEANING
NOTE
See "Guide Bar and Saw Chain-Install/Remove Instructions for
sprocket guard removal/replacement instructions.
Muffler Side
Remove air filter cover and remove spark plug lead.
1.
2.
Remove two guide bar nuts and remove sprocket guard.
Remove three muffler cover screws and remove muffler cover.
3.
4.
Using a stiff bristle cleaning brush (do not use a metal brush),
remove debris from cylinder fins in muffler area.
5.
Assemble components in reverse order
Starter Side
Remove air filter cover and remove spark plug lead.
1.
2.
Remove plastic plug in side handle mount (D), and remove side
handle mounting screw.
3.
Remove four starter cover screws and remove starter cover.
4.
Using a stiff bristle cleaning brush (do not use a metal brush),
remove debris from flywheel and ignition coil area.
5.
Assemble components in reverse order.
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