Replacing The Air Filter; Adjusting The Carburetor; Spark Plug - Stihl HT 102 Instruction Manual

Replacing the Air Filter

Filters have an average life of more than
a year. Do not remove the filter cover or
replace the air filter as long as there is no
noticeable loss of power.
If there is a noticeable loss of engine
power
3
4
Turn the choke knob to g.
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Loosen the screws (1).
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Remove the filter cover (2).
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Clean away loose dirt from around
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the filter.
Remove the filter element (3).
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Replace dirty or damaged filter
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element (3).
Replace any damaged parts.
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Installing the Filter Element
Install the filter element (3) in the
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filter housing and fit the cover.
Insert the screws (1) and tighten
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them down firmly.
HT 102, HT 103, HT 132, HT 133

Adjusting the Carburetor

The carburetor has been set at the
factory to provide an optimum fuel-air
mixture under most operating
conditions.
Adjusting Idle Speed
2
1
1
Engine stops while idling
Warm up the engine for about
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3 minutes.
Turn the idle speed screw (LA)
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slowly clockwise until the engine
runs smoothly – the saw chain must
not rotate.
Chain rotates when engine is idling
Turn the idle speed screw (LA)
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counterclockwise until the chain
stops running and then turn the
screw another 1/2 to 3/4 turn in the
same direction.
WARNING
If the chain continues moving when the
engine is idling, have your power tool
checked and repaired by your servicing
dealer.

Spark Plug

If the engine is down on power,
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difficult to start or runs poorly at idle
speed, first check the spark plug.
Fit a new spark plug after about 100
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operating hours – or sooner if the
electrodes are badly eroded. Install
only suppressed spark plugs of the
type approved by STIHL – see
"Specifications".
Removing the Spark Plug
1
2
3
Remove the cover (1).
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Pull off the spark plug boot (2).
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Unscrew the spark plug (3).
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English
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