Solo USA 280 User Manual

MS 270, MS 270 C, MS 280, MS 280 C

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.

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.

:

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”!

:

Turn the bar over – 
every time you sharpen the chain  
and every time you replace the 
chain –  this helps avoid one-sided 
wear, especially at the nose and 
underside of the bar.

:

Regularly clean 
the oil inlet hole (1), 
the oilway (2) and 
the bar groove (3).

:

Measure groove depth – 
with scale on filing gauge* – in area 
used most for cutting.

*

see “Guide to Using this Manual”

001BA119 KN