Instruction Manual

FS 240, FS 240 C, FS 240 R, FS 240 RC, FS 260 R, FS 260 RC
English
35
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 Rotate the screw (1) in the cap (2)
until the screw head projects from it.
N Lift the front of the cap (2) and push
it to the rear to disengage.
N Leave the cap to one side.
N Pull off the spark plug boot (3).
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 Screw in spark plug
N Firmly press the spark plug
connector onto the spark plug.
N Align the spark plug connector so
that the ignition cable points to the
upper left corner (arrow).
N Place the cap (1) on the hood from
behind and at a slight angle,
pressing the nose (2) into the
opening (3) of the hood.
N On the front, swivel the cap onto the
hood, screw in the screw (4) and
tighten.
Spark Plug
1
9926BA020 KN
3
9926BA021 KN
000BA039 KN
A
1
000BA045 KN
0000-GXX-B459-A0
4
3
2
9926BA022 KN