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SPROCKET
•
A damaged sprocket (C) will cause premature damage or wear of saw
chain.
•
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) other-
wise 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 kgf • cm (130 – 150 in • lbf)
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
1. Remove air filter cover and remove spark plug lead.
2. Remove two guide bar nuts and remove sprocket guard.
3. Remove three muffler cover screws and remove muffler cover.
4. Using a stiff bristle cleaning brush (do not use a metal brush), re-
move debris from cylinder fins in muffler area.
5. Assemble components in reverse order
Starter Side
1. Remove air filter cover and remove spark plug lead.
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), re-
move debris from flywheel and ignition coil area.
5. Assemble components in reverse order.
20
Worn : 0.5 mm
D
C
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