Owner's Manual

MS 271, MS 291, MS 291 C
English
43
– Too much oil in fuel mix.
– Dirty air filter.
– Unfavorable running conditions,
e.g. operating at part load.
Installing the spark plug
N Insert the spark plug through the
grommet and screw it in by hand.
N Tighten down the spark plug, fit the
boot and press it down firmly.
N Install the shroud – see "Shroud".
Remove the fan housing
N Remove the shroud – see "Shroud"
N Remove screws (1)
N Push hand guard upward
N Pull the bottom of the fan housing
away from the crankcase and
remove downwards
Remove the rope rotor
For standard versions
N Carefully press the spring clip (1) off
of the axle with a screwdriver or
suitable pliers
N Carefully remove the rope rotor with
washer (2) and pawl (3)
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
5902BA016 KN
Replacing the Starter Rope
and Rewind Spring
1
1
1
1
5902BA028 KN
1
2
3
2710BA004 KN