Instruction Manual

MS 201 C-M
English
44
If there is a loss of engine power, the
machine is difficult to start or runs poorly
at idle, first check the spark plug.
Install a new spark plug after
approximately 100 operating hours or
earlier if the electrodes are
eroded/corroded.
The wrong fuel mix (too much engine oil
in the gasoline), a dirty air filter and
unfavorable running conditions (mostly
at part throttle etc.) affect the condition
of the spark plug. These factors cause
deposits to form on the insulator nose,
which may degrade performance.
Removing the Spark Plug
N Move the Master Control lever to the
stop position (0).
N Disengage the chain brake.
N Rotate the captive nut (1)
counterclockwise until it hangs
loosely in the sprocket cover.
N Remove the sprocket cover (2) with
captive nut.
N Pull off the spark plug boot.
N Unscrew the spark plug.
Checking the spark plug
N Clean the spark plug if it is dirty
N Check the electrode gap (A) and
readjust if necessary – see
"Specifications"
N Use only resistor type spark plugs of
the approved range. See the
chapter "Specifications" in this
instruction manual
Correct the problems that have caused
fouling of the spark plug:
– too much oil in fuel mix;
– dirty air filter; or
– unfavorable running conditions, e.g.
operating at part throttle.
Spark Plug
0011BA041 KN
1
0011BA002 KN
2
0011BA020 KN
000BA039 KN
A