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FS 131, FS 131 R
English
33
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
Remove the cover (1).
N
Pull off the spark plug boot (2).
N
Unscrew the spark plug (3).
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
Screw the spark plug (3) into the
cylinder.
N
Tighten down the spark plug (3) with
the combination wrench.
N
Press the boot (2) firmly onto the
spark plug.
N
Fit the cover (1) and screw it down
firmly.
Spark Plug
3
2
1
0000-GXX 0537-A0
000BA039 KN
A
1
000BA045 KN
Содержание FS 131 R
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