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© 2012 ICS, Blount International Inc. Specifications are subject to change without notice. REV020212 F/N 549305
660GC OPERATOR’S MANUAL
22
DRIVE SPROCKET INSTALLATION
• Slide the rim sprocket onto the splined adapter, either side out.
• Apply a liberal amount of grease to the needle bearing.
• Place the thin metal washer onto drive shaft. Slide the needle
bearing and clutch cup w/rim sprocket onto shaft and slide the
second thin metal washer onto the drive shaft. (Figure 3).
• Install the clutch by turning it counter clockwise on the drive
shaft and firmly tighten. Installation of drive sprocket assembly
is now complete.
Figure 3
SPARK PLUG
• A worn or fouled spark plug can cause a loss of power,
difficulty starting or rough idle (Figure 4).
• If the spark plug is dirty, clean it with a wire brush and check
the electrode gap. Readjust if necessary. The correct gap is
0.020 in (0.5 mm).
• The spark plug should be replaced after 40 hours of operation
or earlier if the electrode is badly corroded.
• Always use the recommended spark plug type. Using the
wrong spark plug can severely damage the piston and cylinder
(see specifications for part #).
Figure 4
CARBURETOR
• The function of the carburetor is to mix fuel with air.
Adjustments other than idle speed should be made by a
qualified technician.
•
Before adjusting the engine idle speed, make sure the air
filter is clean and the engine is warmed up.
T – Idle Screw
is adjusted so that the engine idles smoothly
but the clutch does not engage.
T
•
If saw has been running satisfactorily and there is a gradual decrease in power and drop
in RPM at full throttle, the filter may have become dirty or saturated with water.
MAINTENANCE
Summary of Contents for 660GC
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