Stihl MS 251 Instruction Manual page 42

English
Choke shutter closed (l)
If the engine is cold (also use this
–
position if the engine stopped when
you opened the throttle after
starting)
Starting throttle position (n)
If the engine is warm, i.e. if it has
–
been running for about one minute.
Hold and start your saw as
N
described.
When Engine Begins to Fire
4
Set the Master Control lever (4) to
N
the starting throttle position (n).
Hold and start your saw as
N
described.
40
As Soon as Engine Runs
Press down trigger trigger lockout
N
and the blip the throttle trigger (3) –
the Master Control lever (4) moves
to the run position (F) and the
engine settles down to idling speed.
STOP
NOTICE
0
As the chain brake is still engaged, the
engine must be returned to idling speed
immediately – or the engine housing and
chain brake might otherwise be
damaged.
Pull the hand guard back toward the
N
front handle.
The chain brake is now disengaged –
your saw is ready for operation.
NOTICE
Always disengage chain brake before
accelerating the engine. High revs with
STOP
the chain brake engaged (chain locked)
will quickly damage the clutch and chain
4
brake.
0
At very low outside temperatures
3
N
N
Shutting Off the Engine
N
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.
N
N
N
N
N
Allow engine to warm up at part
throttle.
Change over to winter operation if
necessary – see "Winter Operation".
Move the Master Control lever to the
stop position (0).
Move the Master Control lever to the
stop position (0).
Remove the spark plug – see
"Spark Plug".
Dry the spark plug.
Crank the engine several times with
the starter to clear the combustion
chamber.
Refit the spark plug – see "Spark
Plug".
MS 251, MS 251 C