Spark Plug - Stihl HT 56 C Manual De Instrucciones

Start and warm up the engine if
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necessary.
Adjust idle speed with the idle speed
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screw (LA) so that the saw chain
does not rotate.
Fine Tuning for Operation in
Mountains or at Sea Level
A slight correction of the setting may be
necessary if engine power is not
satisfactory when operating at high
altitude or at sea level.
Warm up the engine.
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At high altitude
Turn high speed screw (H)
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clockwise (leaner) – no further than
stop.
At sea level
Turn high speed screw (H)
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counterclockwise (richer) – no
further than stop.
Adjusting Idle Speed
Warm up the engine.
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Engine stops while idling
Turn the idle speed screw (LA)
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slowly clockwise until the engine
runs smoothly – the saw chain must
not rotate.
HT 56 C
Chain rotates when engine is idling
Turn the idle speed screw (LA)
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counterclockwise until the chain
stops moving and then turn the
screw another full turn in the same
direction.
If the saw chain continues to
rotate when the engine is idling,
have your machine checked and
repaired by your servicing dealer.
Erratic idling behavior, engine stops
even though setting of LA-screw has
been corrected, poor acceleration
Idle setting is too lean
Turn the low speed screw (L)
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counterclockwise, no further than
stop, until the engine runs and
accelerates smoothly.
Erratic idling behavior, engine speed
drops when swinging the machine
Idle setting is too rich
Turn the low speed screw (L)
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clockwise (1/8 of a turn or 45° at a
time) until the engine runs smoothly
and accelerates well.
It is usually necessary to change the
setting of the idle speed screw (LA) after
corrections to the low speed screw (L).

Spark Plug

If engine is down on power, difficult to
start or runs poorly at idling speed, first
check the spark plug.
Fit a new spark plug after approx. 100
operating hours or earlier if the
electrodes are badly eroded.
Wrong fuel mix (too much engine oil in
the gasoline), a dirty air filter and
unfavorable running conditions (mostly
at part throttle etc.) affect the condition
of the spark plug. These factors cause
deposits to form on the insulator nose
which may result in trouble in operation.
Removing the Spark Plug
Shut off the engine
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The spark plug boot (2) sits inside the
cap (1).
The cap (1) protects the spark
plug boot from damage. Do not
operate the machine without a
cap – replace a damaged cap.
Pull off the spark plug boot (2)
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together with the cap (1).
Unscrew the spark plug (3).
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English
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