Stihl Ms 201

MS 201, MS 201 C
English
30
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 Release 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.
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
0011BA001 KN
1
0011BA002 KN
2
0011BA020 KN
000BA039 KN
A
1
000BA045 KN