Instruction Manual

MS 170, MS 170 C, MS 180, MS 180 C
English
46
WARNING
To reduce the risk of fire and burn injury,
use only spark plugs authorized by
STIHL. Always press the spark plug
boot (1) firmly and securely onto the
spark plug terminal (2).
Do not use a spark plug with a
detachable SAE adapter terminal (3).
Arcing may occur that could ignite
combustible fumes and cause a fire.
This can result in serious injuries or
damage to property.
N Only use resistor type spark plugs
with solid, non-threaded terminals
Installing the spark plug
N Install the spark plug and connect
the spark plug boot (press it down
firmly) – reassembly all other parts
in the reverse sequence.
For periods of 3 months or longer
N Drain and clean the fuel tank in a
well ventilated area.
N Dispose of fuel properly in
accordance with local
environmental requirements.
N Run the engine until the carburetor
is dry – this helps prevent the
carburetor diaphragms sticking
together.
N Remove the saw chain and guide
bar, clean them and spray with
corrosion inhibiting oil.
N Thoroughly clean the machine – pay
special attention to the cylinder fins
and air filter.
N If you use a biological chain and bar
lubricant, e.g. STIHL BioPlus,
completely fill the chain oil tank.
N Store the machine in a dry, high or
locked location, out of the reach of
children and other unauthorized
persons.
N Remove the chain sprocket cover,
chain and guide bar.
N Disengage the chain brake: Pull the
hand guard toward the front handle.
Replace the chain sprocket
– after using two saw chains or
sooner
– if the wear marks (arrows) are
deeper than 0.02 in (0.5 mm) since
this would reduce the life of the
chain. Use a gauge (special
accessory) to check the depth of the
wear marks.
It is best to use two saw chains in
rotation with one sprocket.
STIHL recommends the use of original
STIHL sprockets to ensure correct
operation of the chain brake.
2
0000-GXX-1830-A0
3
1
Storing the Machine Checking and Replacing the
Chain Sprocket
143BA042 KN