Instruction Manual

MS 271, MS 271 C, MS 291, MS 291 C
English
28
Pre-heat carburetor
N Remove the shroud – see "Shroud"
At temperatures below +10 °C
N Using the combination wrench or a
screwdriver, pry the shutter out of
the s (summer operation) position
N Place the shutter with the opening in
the direction of the chain saw
(winter operation) – arrow points
toward symbol r – shutter must
audibly snap into place
In the winter operation position, the tip of
the arrow (1) is visible.
N Fit the shroud – see "Shroud"
Heated air is now drawn in from around
the cylinder and circulates around the
carburetor – this helps prevent
carburetor icing.
At temperatures above +20 °C
N Ensure that the shutter is set back to
position s (summer operation)
without fail, otherwise the engine
may malfunction due to overheating
At temperatures below -10 °C
In case of erratic idling behavior or poor
acceleration
N Turn the low speed screw (L)
1/4 turn counterclockwise
Whenever the low speed screw (L) has
been adjusted, it is usually also
necessary to adjust the idle speed
screw (LA), see "Setting the carburetor".
N if the chain saw is extremely cold
(frost formation) – after starting,
bring the engine up to operating
temperature at increased idle speed
(disengage chain brake!)
Air filter system
N Retrofit new air filter if necessary –
see "Air filter system"
Positions of the master control lever
Stop 0 – engine off – ignition is switched
off
Run F – Engine running or can start
Warm start n – this position is for
starting the warm engine – the master
control lever returns to run when the
throttle trigger is squeezed
Cold start l – this position is for
starting the cold engine
Winter Operation
5902BA002 KN
5902BA003 KN
1
Starting / Stopping the
Engine
STOP
0
001BA140 KN