17
Maintenance Cont …...
Spark plug (Fig 22-D)
To ensure that the saw’s engine retains its power, the spark plug must be clean and have the
correct electrode gap (0.6 mm). The spark plug must be cleaned or replaced after every 20
hours of service.
Set the On/Off switch to Stop (0).
Remove the top cover by undoing the fastening screw on the cover. You can then remove the
cover.
Disconnect the ignition cable from the spark plug by pulling and twisting it simultaneously.
Remove the spark plug using a spark plug wrench. DO NOT USE ANY OTHER TOOLS.
Clean the spark plug with a copper wire brush or fit a new one.
Carburettor setting
The carburettor has been factory set. If it requires adjusting, take the saw to your nearest
authorized after-sales service outlet.
Chain bar
Turning the chain bar. The bar should be reversed every 8 working hours to ensure uniform
wear.
Keep the bar groove and lubrication hole clean. Check the bar rails frequently for wear and, if
necessary, remove the burs and square-up the rails using the flat file.
WARNING:
Never fit a new chain to a worn chain bar.
Chain
Chain sharpening requires special tools to ensure that cutters are sharpened at the correct
angle and depth. For the inexperienced chain saw user, we recommend that the saw chain be
professionally sharpened by a service centre.
Chain sharpening (Fig. 23 & 24)
Sharpen the chain using protective gloves and a round file of ø3/16” (4.8mm).
Only sharpen the cutters with outward strokes (Fig. 24) observing the values given in Fig. 23.
After sharpening, the cutting links must all have the same width and length.
NOTE:
A sharp chain produces well-defined chips. When your chain starts to produce
sawdust, it is time to resharpen it.
