Instruction Manual

FS 40, FS 40 C, FS 50, FS 50 C
English
20
N Use resistor type spark plugs with a
properly tightened adapter nut.
Installing the Spark Plug
N Screw the spark plug into the
cylinder.
N Press the boot firmly onto the spark
plug.
If engine running behavior is
unsatisfactory even though the air filter
is clean and the carburetor is properly
adjusted, the cause may be the muffler.
Have the muffler checked for
contamination (carbonization) by your
servicing dealer.
STIHL recommends that you have
servicing and repair work carried out
exclusively by an authorized STIHL
servicing dealer.
For periods of about 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, clean and inspect the
cutting attachment. Coat metal
cutting attachments with corrosion
inhibitor.
N Thoroughly clean the machine – pay
special attention to the cylinder fins
and air filter.
N Store the machine in a dry and
secure location – out of the reach of
children and other unauthorized
persons.
Engine Running Behavior Storing the Machine