Owner's Manual

MS 251, MS 251 C
English
35
Preheating the carburetor
N Remove the shroud – see "Shroud".
At temperatures below +50°F (+10°C)
N Use a screwdriver to pry the shutter
out of the summer position (s).
N Fit the shutter in the winter
position (r) with its opening facing
the chain saw – the shutter must
engage audibly in position.
N Install the shroud – see "Shroud".
Heated air is now drawn in from around
the cylinder to warm the carburetor – this
helps prevent carburetor icing.
At temperatures above +70°F (+20°C)
N Always return the shutter to the
summer position (s ) to avoid
engine running problems and
overheating.
At temperatures below +14°F (-10°C)
N If your saw is very cold (frost or ice
on machine), start the engine and
keep it at a high idle speed (with
chain brake disengaged) until it
reaches normal operating
temperature.
If idling behavior is erratic or
acceleration is poor:
N Turn the low speed screw (L) 1/4 of
a turn counterclockwise.
It is usually necessary to change the
setting of the idle speed screw (LA) after
every correction to the low speed
screw (L) – see "Adjusting the
Carburetor".
Filter system
N Convert the air filter if necessary –
see "Air Filter System".
Versions with Easy2Start
WARNING
This machine is extremely simple and
easy to start, even for children.
To reduce the risk of serious or fatal
injury:
– do not allow children or other
unauthorized persons to attempt to
start or otherwise use the machine
– never allow children or
unauthorized persons access to the
machine
– never leave the machine
unattended while working or during
work breaks
– after work, store in a safe, secure
location out of the reach of children
and other unauthorized persons
Winter Operation
2310BA000 KN
2310BA001 KN
Starting / Stopping the
Engine