During Operation; After Finishing Work; Oil Quantity Control - Stihl MS 290 Manual De Instrucciones

During operation

Check chain tension frequently
A new chain has to be retensioned more
often than one that has been in use for
some time.
Chain cold:
Tension is correct when chain fits snugly
against the underside of the bar and can
still be pulled along the bar by hand.
Retension if necessary – see
"Tensioning the Saw Chain".
Chain at operating temperature:
The chain stretches and begins to sag.
The drive links must not come out of the
bar groove – the chain may otherwise
jump off the bar.
Retension the chain – see "Tensioning
the Saw Chain"!
Always slacken off the chain after
finishing work. The chain contracts
as it cools down. If it is not
slackened off, it can damage the
crankshaft and bearings.
MS 290, 310, 390
After long period of full-throttle
operation
Allow engine to run for a short while at
idle speed so that engine heat can be
dissipated by flow of cooling air. This
protects engine-mounted components
(ignition, carburetor) from thermal
overload.

After finishing work

:
Slacken off the chain if you have
retensioned it at operating
temperature during cutting work.
The chain contracts as it cools
down. If it is not slackened off, it
could damage the crankshaft and
bearings.
Storing your saw for a short period:
Wait for engine to cool down. To avoid
condensation, fill the fuel tank and keep
the machine in a dry place, well away
from sources of ignition, until you need it
again.
Storing for a long period:
See "Storing the Unit"!
English / USA
Oil Quantity
Control *
1
Different quantities of oil are required for
different bar lengths, types of wood and
cutting techniques.
:
Use the adjusting screw (1) (on
underside of machine) to vary the
oil feed rate as required.
:
E = Ematic position, medium oil flow
rate - turn adjusting screw to "E"
(Ematic position)
: To increase oil feed – turn adjusting
screw clockwise.
:
To reduce oil feed – turn adjusting
screw counter-clockwise.
Your chain must always be wetted
with a film of lubricant.
* Special accessory
39