Checking The Chain Saw; Checking The Operation Of The Chain Brake; Testing The Controls - Stihl MS 661 C-M Instruction Manual

16 Checking the Chain Saw

unauthorized use, shut off the engine, ensure the chain has
stopped and engage the chain brake before walking with the
saw or setting it down.
To shut off the engine:
1
► Release the throttle trigger (2) and throttle trigger
lockout (3).
► Move the Master Control Lever (1) to stop position
The engine stops and the Master Control Lever (1)
springs back to position
16 Checking the Chain Saw

16.1 Checking the Operation of the Chain Brake

WARNING
Operating the saw with a missing, damaged, modified or
improperly maintained chain brake increases the risk of
severe or fatal injury from kickback. Never attempt to modify
or disable the chain brake. Never operate a saw if the chain
brake has been modified or does not function properly. If you
detect a change in the operating characteristics of the chain
brake, have your saw serviced immediately by an authorized
STIHL servicing dealer.
Before starting work, check the operation of the chain brake:
► Run the engine at idle speed.
► Engage the chain brake, @ 12.1.
0458-759-8221-C
3
2
when released.
► Accelerate up to full throttle for no more than 3 seconds.
A properly functioning chain brake prevents the chain from
rotating.
► If the chain brake fails to prevent the chain from rotating,
have the saw inspected and repaired by an authorized
STIHL servicing dealer.

16.2 Testing the Controls

Before starting work, confirm that the throttle trigger
lockout (1) and throttle trigger (2) are undamaged and
functioning properly.
1
.
Throttle Trigger Lockout (1) and Throttle Trigger (2)
WARNING
To reduce the risk of serious or fatal injuries, keep hands,
feet and other parts of the body away from the chain. Do not
touch the saw chain while the engine is running. Never touch
a moving chain with your hand or any part of your body,
@ 5.6.3. Keep bystanders out of the area while testing the
controls.
To test the controls:
► Shut off the engine, @ 15.
► Attempt to depress the throttle trigger.
If the trigger can be depressed without first depressing the
throttle trigger lockout, take the chain saw to an
authorized STIHL servicing dealer to be repaired before
use.
2
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