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10 Checking the Saw
► Move the Master Control lever (1) to position .
The engine stops and the Master Control lever (1) springs
back to position .
If the engine does not stop:
► Master Control lever to position .
The engine stops.
► Do not use your chainsaw and contact your STIHL
servicing dealer for assistance.
The Master Control lever is defective.
10.1 Checking the Chain Sprocket
► Shut off the engine.
► Disengage the chain brake.
► Remove the chain sprocket cover.
► Remove the bar and chain.
► Use a STIHL gauge to check the wear marks on the
sprocket.
► If wear marks are deeper than a = 0.5 mm: Do not use your
chainsaw and contact your STIHL servicing dealer for
assistance.
The chain sprocket must be replaced.
10.2 Checking the Guide Bar
► Shut off the engine and engage the chain brake.
► Remove the chain and guide bar.
► Measure depth of bar groove with scale on STIHL filing
gauge.
► Install a new guide bar if one of the following points
applies:
– Guide bar is damaged.
– Measured bar groove depth is less than specified
minimum depth, @ 19.3.
– Bar groove is pinched or splayed.
► If you have any queries: Contact your STIHL servicing
dealer for assistance.
10.3 Checking the Saw Chain
► Shut off the engine and engage the chain brake.
10 Checking the Saw
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