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MS 201 T
English
27
N
If the engine is down on power,
difficult to start or runs poorly at idle
speed, first check the spark plug.
N
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
"Specifications".
Removing the spark plug
N
Move the master control lever to the
stop position 0
N
Releasing the chain brake
N
Turn the captive nut (1) to the left
until it hangs loosely in the chain
sprocket cover
N
Remove the chain sprocket
cover (2) with captive nut
N
Pull off the spark plug boot
N
Unscrew spark plug
Checking the spark plug
N
Clean dirty spark plug.
N
Check electrode gap (A) and
readjust if necessary – see
"Specifications".
N
Rectify the problems which have
caused fouling of the spark plug.
Possible causes are:
–
Too much oil in fuel mix.
–
Dirty air filter.
–
Unfavorable running conditions.
WARNING
If the spark plug comes with a
detachable adapter nut (1), screw the
adapter onto the thread and tighten it
down firmly to reduce the risk of arcing
and fire.
Spark Plug
0012BA002 KN
H
L
1
001
1BA002 KN
2
001
1BA020 KN
000BA039 KN
A
1
000BA045 KN