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NOTICE
Always disengage chain brake before
accelerating the engine. High revs with
the chain brake engaged (chain locked)
will quickly damage the clutch and chain
brake.
At very low outside temperatures
Allow engine to warm up at part
N
throttle.
Change over to winter operation if
N
necessary – see "Winter Operation".
Shutting Off the Engine
Move the Master Control lever to the
N
stop position (0).
If Engine Does Not Start
If you did not move the Master Control
lever from the choke closed
position (l) to the starting throttle
position (n) quickly enough after the
engine began to fire, the combustion
chamber may be flooded.
Move the Master Control lever to the
N
stop position (0).
Remove the spark plug – see
N
"Spark Plug".
Dry the spark plug.
N
Crank the engine several times with
N
the starter to clear the combustion
chamber.
Refit the spark plug – see "Spark
N
Plug".
32
Set Master Control lever to the
N
starting throttle position (n) – even
if the engine is cold.
Now start the engine.
N
Operating Instructions
During the break-in period
A factory new machine should not be run
at high revs (full throttle off load) for the
first three tank fillings. This avoids
unnecessarily high loads during the
break-in period. As all moving parts
have to bed in during the break-in
period, the frictional resistances in the
shortblock are greater during this period.
The engine develops its maximum
power after about 5 to 15 tank fillings.
During work
NOTICE
Do not make the mixture leaner to
achieve an apparent increase in power –
this could damage the engine – see
"Adjusting the Carburetor".
NOTICE
Open the throttle only when the chain
brake is off. Running the engine at high
revs with the chain brake engaged
(chain locked) will quickly damage the
shortblock and chain drive (clutch, chain
brake).
Check chain tension frequently
A new saw chain must be retensioned
more frequently than one that has been
in use already for an extended period.
MS 231, MS 231 C, MS 251, MS 251 C
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