MS 250 Chainsaw Manual

MS 250
English
34
N Lift out the shutter (in front of spark
plug) vertically.
N Turn the shutter 180°.
N Refit the shutter.
N Refit the carburetor box cover and
secure it with the knob.
Heated air is now drawn in from around
the cylinder to warm the carburetor – this
helps prevent carburetor icing.
NOTICE
At temperatures above +70 °F (+ 20°C),
always close the shutter again. This is
necessary to avoid engine running
problems and overheating.
Positions of Master Control Lever
Stop 0 – engine off – the ignition is
switched off
Normal run position (F) – engine runs or
can fire.
Starting throttle (n) – this position is
used to start a warm engine. The Master
Control lever moves to the normal run
position as soon as the throttle trigger is
squeezed.
Choke shutter closed (l) – this position
is used to start a cold engine.
Setting the Master Control Lever
To move the Master Control lever from
the normal run position (F) to choke
closed (l), press down the throttle
trigger lockout and squeeze the throttle
trigger at the same time and hold them in
that position – now set the Master
Control lever.
To select the starting throttle
position (n), move the Master Control
lever to choke closed (l) first, then
push it into the starting throttle
position (n).
The Master Control lever must be in the
choke closed position (l) for the
changeover to the starting throttle
position (n).
The Master Control lever moves from
the starting throttle position (n) to the
run position (F) when you press down
the throttle trigger lockout and blip the
throttle trigger at the same time.
To switch off the engine, move the
Master Control lever to Stop (0).
Choke shutter closed (l)
– if the engine is cold
– if the engine stalls when you open
the throttle after starting.
– if the fuel tank was run until empty
(engine stopped).
Starting throttle position (n)
– if the engine is warm, i.e. if it has
been running for about one minute.
– after engine begins to fire,
– after clearing a flooded combustion
chamber.
135BA029 LÄ
Starting / Stopping the
Engine
STOP
0
001BA140 KN