user manual

MS 171, MS 181, MS 181 C, MS 211, MS 211 C
English
43
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.
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.
N Remove the shroud – see "Shroud".
N Take out the screws (1).
N Use the combination wrench (2) to
ease the hand guard outwards and
pry it off the fan housing.
N Pull the fan housing off the
crankcase and remove it
downwards.
Warning!
To reduce the risk of fire and burn injury,
use only spark plugs authorized by
STIHL. Always press spark plug boot (1)
snugly onto spark plug terminal (2) of
the proper size. (Note: If terminal has
detachable SAE adapter nut, it must be
attached.) A loose connection between
spark plug boot and ignition wire con-
nector in the boot may create arcing that
could ignite combustible fumes and
cause a fire.
1
2
000BA071 KN
Engine Running Behavior Replacing the Starter Rope
and Rewind Spring
1
2
1
1
1
533BA011 KN