Adjusting The Carburetor; Spark Arresting Screen In Muffler; Spark Plug - Stihl MM 56 Instruction Manual

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
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 MultiTool must
not run.
MultiTool runs when the engine is idling
Turn the idle speed screw (LA)
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counterclockwise until the MultiTool
stops moving and then turn the
screw about another 1/2 to 3/4 turn
in the same direction.
WARNING
If the MultiTool continues to run when
the engine is idling, have your machine
checked and repaired by your servicing
dealer.
MM 56 C
Spark Arresting Screen in
Muffler
If the engine is down on power,
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check the spark arresting screen in
the muffler.
Wait for the muffler to cool down.
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Use the combination wrench to
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unscrew the spark arrestor.
Clean the spark arrestor screen. If
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the screen is damaged or heavily
carbonized, fit a new one.
Insert the spark arrestor and tighten
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it down firmly with the combination
wrench.

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
1
"Specifications".
Removing the Spark Plug
Shut off the engine.
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The spark plug boot (2) is under the
cap (1).
WARNING
The cap (1) protects the spark plug boot
from damage. Do not operate the
machine without a cap – replace a
damaged cap.
Remove the cap (1).
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Pull off the spark plug boot (2).
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Allow the spark plug (3) to cool
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down.
Unscrew the spark plug (3).
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English
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