Instruction Manual

MS 170, MS 170 C, MS 180, MS 180 C
English
44
Basic information
The carburetor has been factory-
adjusted to provide the engine with a
optimal fuel-air mixture in all operating
states.
Standard setting
N Check the air filter - replace if
necessary
N Check spark arresting screen –
clean or replace it if necessary
N Carefully screw the idle speed
screw (LD) down counterclockwise
(left-hand thread) until it is firmly
seated, then 2 turns clockwise
(standard setting LD = 2)
Setting the idle speed
N Start and warm up the engine
N Using the idle speed screw (LD), set
the idle speed correctly: The saw
chain must not rotate
Engine speed too low when idling:
N Turn the idle speed adjusting
screw (LD) slowly clockwise until
the saw chain begins to rotate –
then back off 1/2 turn
Saw chain rotates at idle speed:
N Turn the idle speed adjusting
screw (LD) slowly counterclockwise
until the saw chain stops rotating –
then turn an additional 1/2 turn in
the same direction
WARNING
If the saw chain continues to keep
rotating in idle even after adjustment,
have the chain saw checked by a
servicing dealer.
In some countries, the muffler is fitted
with a spark arresting screen.
WARNING
To reduce the risk of fire caused by hot
particles escaping from the machine,
never operate the machine without a
spark arresting screen, or with the spark
arresting screen damaged. Do not
modify the muffler or spark arresting
screen. To reduce the risk of fire from
accumulated debris such as pine
needles, branches or leaves, ensure
that the muffler plugs are in place before
taking up work.
NOTICE
According to the law or regulations in
some countries or federal states, certain
operations may only be carried out if a
properly serviced spark arresting screen
is provided.
N If the engine is down on power,
check the spark arresting screen in
the muffler
N Wait for the muffler to cool down
Adjusting the Carburetor
207BA029 KN
Spark Arresting Screen in
Muffler