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Use only special saw chain sharpening files. Other files have the wrong shape and
cut.Select file diameter according to chain pitch. Ensure to observe certain angles when
resharpening the chain cutter.
Cutting Shapes: Micro=Semi-chisel
The specified angles A and B are obtained automatically if the recommended files or
sharpening tools and correct settings are used. The angles must be the same on all
cutters. If the angles are uneven: Chain will run roughly, not in a straight line, wear quickly
and finally break. As these requirements can be met only after sufficient and constant
practice:
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Use a file holder :A file holder must be used for manual resharpening . The correct
filing angles are marked on the file holder.
WARNING
It is absolutely essential to comply with the angles and
dimensions specied below. If the saw chain is incorrectly
sharpened – and in particular if the depth gauge is set too low –
there is an increased risk of kickback, with resulting risk of
injury.
ENGINE MANAGEMENT
Cleaning the Air Filter
Ÿ
Accumulated dust in the air filter will reduce engine efficiency, increase fuel
consumption and allow abrasive particles to pass into the engine. Remove the air filter
as often as necessary to maintain a clean condition.
Ÿ
Light surface dust can readily be removed by tapping the filter. Heavy deposits should
be washed out in suitable solvent.
Ÿ
Remove filter cover by loosening air filter cover knob.
Spark Plug
If engine is down on power, difficult to start or runs poorly at idling speed, first check the
spark plug. Fit a new spark plug after approximately every 100 operating hours or earlier
if the electrodes are badly eroded. Wrong fuel mix (too much engine oil in the gasoline), a
dirty air filter and unfavorable running conditions (mostly at part throttle etc.) affect the
condition of the spark plug. These factors cause deposits to form on the insulator nose
which may result in trouble in operation.
Removing the Spark Plug
Ÿ
Move the slide switch to STOP.
Ÿ
Pull off the spark plug boot.
Ÿ
Unscrew the spark plug.