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10 Checking the Saw
► Use a STIHL filing gauge (2) to check the height of the
depth gauges (1). The STIHL filing gauge must match the
chain pitch.
► If a depth gauge (1) projects from the filing gauge (2):
Lower the depth gauge (1), @ 16.3.
► Make sure the service marks (1 to 4) on the cutters are
visible.
► If one of the service marks is not visible on a cutter: Do not
use your chainsaw and contact your STIHL servicing
dealer for assistance.
► Use a STIHL filing gauge to check that a filing angle of 30°
has been maintained on all cutters. The STIHL filing
gauge must match the chain pitch.
► If a filing angle of 30° has not been maintained:
Resharpen the saw chain.
► If you have any queries: Contact your STIHL servicing
dealer for assistance.
10.4 Testing the Chain Brake
► Shut off the engine and engage the chain brake.
WARNING
The chain's cutters are very sharp. There is a risk of cut
injuries.
► Wear work gloves made of durable material.
► Try to pull the chain along the guide bar by hand.
If the chain cannot be pulled along the bar by hand, the
chain brake is functioning.
► If the chain can be pulled along the bar by hand: Do not
use your chainsaw and contact your STIHL servicing
dealer for assistance.
The chain brake is defective.
10.5 Checking the Controls
Throttle trigger lockout and throttle trigger
► Shut off the engine and engage the chain brake.
► Attempt to pull the trigger without depressing the lockout
lever.
► If the trigger can be pulled: Do not use your chainsaw and
contact your STIHL servicing dealer for assistance.
There is a malfunction in the throttle trigger lockout.
► Press down the throttle trigger lockout and hold it there.
► Pull the throttle trigger and release it again.
► If the throttle trigger is stiff or does not spring back to its
idle position: Do not use your chainsaw and contact your
STIHL servicing dealer for assistance.
The throttle trigger is defective.
Stopping the engine
► Start the engine.
► Move the Master Control lever to position .
The engine stops and the Master Control lever springs
back to position .
► If the engine does not stop:
► Move the 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.
10.6 Checking Chain Lubrication
► Start the engine and disengage the chain brake.
► Hold the guide bar over a light surface.
► Open the throttle.
Chain oil is thrown off the chain and is visible on the light
surface. Chain lubrication is operating properly.
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