Stihl 017 Instruction Manual - Page 39

During Operation, After Finishing Work, During Break-in Period

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During Break-in Period During Operation After Finishing Work 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). 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. 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. 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. 017, 018 37

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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).
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.
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.
During Operation
After Finishing Work
During Break-in Period
017, 018
37