During Break-In Period; During Operation; After Finishing Work - Stihl 017 Instruction Manual

During 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
unnecessary 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 engine are greater
during this period. The engine develops
its maximum power after about 5 to 15
tank fillings.
Important:
Always disengage the chain brake
before opening the throttle. Running the
engine at higher revs with the chain
brake engaged (saw chain at a standstill)
will quickly damage the engine and chain
drive (clutch, chain brake).
017, 018

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.
Cold chain:
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 chapter "Tensioning the Saw Chain".
Chain at operating temperature:
The chain stretches and begins to sag.
The drive links on the underside of the
bar must not come out of the bar groove
- the chain may otherwise jump off the
bar.
Retension the chain -
see chapter "Tensioning the Saw Chain".
Always slacken off the chain again after
finishing work.
The chain contracts as it cools down.
If it is not slackened off, it may damage
the crankshaft and bearings.
After a long period of full-throttle
operation
Allow engine to run for a short while at
idling speed so that engine heat can be
dissipated by the flow of cooling air.
This helps protect 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.
Before storing your saw
for a long period -
• • • •
Drain and clean the fuel tank.
• • • •
Run engine until carburetor is dry.
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