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HS 46, HS 46 C, HS 56 C
English
16
N If the engine is down on power,
difficult to start or runs poorly at idle
speed, first check the spark plug.
N Fit a new spark plug after about 100
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
N Stopping the Engine
N Carefully pry open the flap (1) with a
suitable tool (e.g. combination
wrench).
N Remove the spark plug boot (2)
using a suitable tool (e.g.
combination wrench).
N Unscrew the spark plug.
Checking the Spark Plug
N Clean dirty spark plug.
N Check electrode gap (A) and
readjust if necessary – see
"Specifications".
N Rectify the problems which have
caused fouling of the spark plug.
Possible causes are:
Too much oil in fuel mix.
Dirty air filter.
Unfavorable running conditions.
WARNING
Arcing may occur if the adapter nut (1) is
loose or missing. Working in an easily
combustible or explosive atmosphere
may cause a fire or an explosion. This
can result result in serious injuries or
damage to property.
N Use resistor type spark plugs with a
properly tightened adapter nut.
Installing the Spark Plug
N Insert and screw home the spark
plug by hand.
N Tighten down the spark plug.
N Press the spark plug boot firmly
onto the spark plug.
N Close the flap (1), top first, then the
bottom, tabs (arrows) must snap
into position.
Checking the Spark Plug
0008BA017 KN
0008BA018 KN
2
000BA039 KN
A
1
000BA045 KN
0008BA019 KN
18


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