Operating Instructions - Stihl MS 150 C Instruction Manual

At very low outside temperatures
If idling behavior is erratic or
acceleration is poor:
Readjust carburetor if necessary,
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see "Adjusting the Carburetor".
If your saw is very cold (frost or ice
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on machine), start the engine and
keep it at a high idle speed (with
chain brake disengaged) until it
reaches normal operating
temperature.
Stopping the engine
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Move Master Control lever (1) to
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Stop 0.
If engine does not start
If you did not move the Master Control
lever from the choke closed
position (l) to the choke open
position (j) quickly enough after the
engine began to fire, the engine is
probably flooded.
Move Master Control lever to
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Stop 0.
Remove the spark plug – see
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"Spark Plug".
MS 150 C
Dry the spark plug.
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Crank the engine several times with
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the starter to clear the combustion
chamber.
Refit the spark plug – see "Spark
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Plug".
Set Master Control lever to the
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starting throttle position (n) – even
if the engine is cold.
Now start the engine.
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If fuel tank has been run completely dry
and then refueled
Press manual fuel pump bulb at
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least nine times.
Set the Master Control lever to the
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starting throttle position (n).
Move the choke lever to the closed
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position (l)
Give the starter rope two pulls.
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Move the choke lever to the open
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position (j).
Now start the engine.
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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.
English
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