Operating Instructions - Stihl HT 131 Instruction Manual

Set the choke knob to e – even if
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the engine is cold.
Now start the engine.
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Throttle cable adjustment
Check adjustment of throttle cable –
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see chapter on "Adjusting the
Throttle Cable".
Fuel tank run until completely dry
After refueling, press the manual
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fuel pump bulb at least five times –
even if the bulb is filled with fuel.
Set the choke knob according to
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engine temperature.
Start the engine.
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HT 100, HT 101, HT 130, HT 131

Operating Instructions

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.
During Operation
NOTICE
Do not make the mixture leaner to
achieve an apparent increase in power –
this could damage the engine – see
"Adjusting the Carburetor".
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 the 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".
NOTICE
The chain contracts as it cools down. If it
is not slackened off, it can damage the
gear shaft 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 the flow of cooling air. This
protects engine-mounted components
(ignition, carburetor) from thermal
overload.
After Finishing Work
Slacken off the chain if you have
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retensioned it at operating
temperature during cutting work.
NOTICE
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 gear shaft and
bearings.
Storing your saw for a short period
Fit the chain scabbard and allow 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.
English
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