Operating Instructions - Stihl MS 290 Instruction Manual

Pull the hand guard toward the
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handlebar: U the chain brake is
released –
the chain saw is ready for use
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
engine and chain drive (clutch, chain
brake).
first always check chain lubrication
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At very low temperatures
Let the engine warm up briefly with
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the throttle slightly open
if necessary, configure for winter
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operation, see "Winter Operation"
MS 290, MS 310, MS 390
Switching off the engine
Move the master control lever to the
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stop position 0
When the fuel tank has run completely
empty and then been refueled
Press the decompression valve
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Pull the starter rope several times to
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prime the fuel line
Restart the engine
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If the engine does not start
The Master Control lever was not
returned to its "warm start" position n in
time when the engine turned over the
first time and has now flooded.
Remove the spark plug, see "Spark
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plug"
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
Reinstall the spark plug, see "Spark
N
plug"
Set the Master Control lever to
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warm start n – even if the engine is
cold
Press the decompression valve
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Restart 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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