Spark Plug - Stihl MS 201 C-M Instruction Manual

English
A
1
min
30-60 s
► Set Master Control lever to position }.
► Engage the chain brake.
► Start the engine without depressing the throttle
trigger. The engine runs and the Master Con‐
trol lever remains in position }.
► Run the engine for at least 30 seconds but no
more than 60 seconds without depressing the
throttle trigger.
WARNING
If the chain brake is disengaged, the chain may
rotate ‑ risk of injury.
Hold your chainsaw as described in the instruc‐
tion manual and do not touch the rotating saw
chain.
► Disengage the chain brake.
NOTICE
The calibration process is aborted if the throttle
trigger is released before the saw is properly cali‐
brated. It is then necessary to restart the calibra‐
tion process.
► Keep the throttle trigger fully depressed.
NOTICE
The chainsaw can be incorrectly calibrated if the
throttle trigger is not kept fully depressed during
calibration. This can damage the saw.
► Keep the throttle trigger fully depressed.
► Depress the throttle trigger for at least 30 sec‐
onds and hold it in that position.
The engine accelerates and the chain rotates.
Calibration of the saw takes place. Engine speed
varies noticeably during calibration.
If the engine stalls:
► Make another attempt to calibrate the saw.
If the engine stalls again:
► Engage the chain brake.
28
B C
> 30 s s
► Do not use your chainsaw and contact your
STIHL servicing dealer for assistance. Your
saw has a malfunction.
As soon as the engine speed drops noticeably:
► Release the throttle trigger.
The engine runs at idling speed Your saw is cali‐
brated and ready for operation.

22 Spark Plug

► If the engine is down on power, difficult to start
or runs poorly at idle speed, first check the
spark plug.
► Fit a new spark plug after about 100 operating
hours – or sooner if the electrodes are badly
eroded. Install only suppressed spark plugs of
the type approved by STIHL – see "Specifica‐
tions".
22.1 Removing the Spark Plug
► Move the Master Control lever to the stop
position (0).
► Disengage the chain brake.
► Rotate the captive nut (1) counterclockwise
until it hangs loosely in the sprocket cover.
► Remove the sprocket cover (2) with captive
nut.
22 Spark Plug
2
1
0458-598-0121-C