Owner's Manual

MS 650, MS 660
English
30
At temperatures below +50 °F
(+10 °C)
N Remove the carburetor box cover
N in the carburetor box cover, move
the slide (1) from summer position
to winter position (2)
Heated air is now drawn in from around
the cylinder and mixed with cold air –
this helps prevent carburetor icing.
N Replace the carburetor box cover
and tighten the knob
Air filter system
N Retrofit new air filter if necessary –
see "Air filter system"
At temperatures below +14 °F (-10 °C)
Under extreme winter conditions
(temperatures below +14°F (-10°C),
powdered or drifting snow), it is
recommended to mount the cover plate
(special accessory) on the fan housing.
The partial covering of the slits in the fan
housing keeps out powdered or drifting
snow.
When the cover plate is mounted, the
slide must be in winter position in the
carburetor box cover.
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!)
N If engine trouble occurs, first check
whether use of the cover plate is
necessary
Switching on the handle heating
system (depending on equipment
version)
N To switch on, set switch to F and to
switch off, return switch to the 0
position
Overheating during continuous use is
impossible. The heating system is
maintenance-free.
Winter Operation
Above +70 °F (+20 °C): Always
return the cover to the position for
"summer operation" again! Risk of
engine malfunction – overheating!
1
2
137BA014 KN
137BA015 KN
Electric Handle Heating
137BA016 KN