FS 87, FS 87 R
English
31
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.
If the spark plug comes with a
detachable adapter nut (1), screw the
adapter onto the thread and tighten it
down firmly to reduce the risk of arcing
and fire.
Installing the spark plug
N Screw the spark plug (3) into the
cylinder and fit the boot (2) (press it
down firmly).
N Check the grease level regularly –
about every 25 hours of operation.
N Unscrew the filler plug (1). If no
grease can be seen on the inside of
the filler plug, screw the tube (2) of
STIHL gear lubricant for
brushcutters (special accessory)
into the filler hole.
N Squeeze up to 5 g grease into the
gearbox.
Do not completely fill the gearbox with
grease.
N Remove the tube of grease (2).
N Refit the filler plug (1) and tighten it
down firmly.
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