Instruction Manual

MS 170, MS 170 C, MS 180, MS 180 C
English
45
N Take out the screws (1) and remove
the cover (2)
N Remove the spark arresting screen
(3) from the muffler (4)
N Clean the dirty spark arresting
screen, replace if damaged or
heavily carbonized
N Refit the spark arresting screen –
place the cover in position and
secure it with the screws.
N If the muffler plugs are missing or
damaged, mount new plugs
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 Simultaneously press the throttle
trigger lockout and throttle trigger
and set the Master Control lever to
cold start l
N Remove the shroud – see "Shroud"
N Pull off the spark plug boot
N Unscrew 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.
3
2
1
1
4
143BA029 KN
Spark Plug
207BA036 KN
000BA039 KN
A