MS 290, MS 310, MS 390
English
31
N
Pull the hand guard toward the
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).
N
first always check chain lubrication
At very low temperatures
N
Let the engine warm up briefly with
the throttle slightly open
N
if necessary, configure for winter
operation, see "Winter Operation"
Switching off the engine
N
Move the master control lever to the
stop position 0
When the fuel tank has run completely
empty and then been refueled
N
Press the decompression valve
N
Pull the starter rope several times to
prime the fuel line
N
Restart the engine
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.
N
Remove the spark plug, see "Spark
plug"
N
Dry the spark plug
N
Crank the engine several times with
the starter – to clear the combustion
chamber
N
Reinstall the spark plug, see "Spark
plug"
N
Set the Master Control lever to
warm start
n
– even if the engine is
cold
N
Press the decompression valve
N
Restart the engine
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.
143BA012 KN
Operating Instructions
