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► Unscrew the nut (1) and remove the sprocket
cover (2).
► Pull off the spark plug boot.
► Unscrew the spark plug.
20.2
Checking the Spark Plug
► Clean dirty spark plug.
► Check electrode gap (A) and readjust if neces‐
sary – see "Specifications".
► Rectify the problems which have caused foul‐
ing of the spark plug.
Possible causes are:
– Too much oil in fuel mix.
– Dirty air filter.
– Unfavorable running conditions.
28
2
1
A
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 inju‐
ries or damage to property.
► Use resistor type spark plugs with a properly
tightened adapter nut.
20.3
Installing the spark plug
► Install the spark plug and connect the spark
plug boot (press it down firmly) – reassembly
all other parts in the reverse sequence.
21 Storing the Machine
For periods of about 30 days or longer
► Drain and clean the fuel tank in a well-ventila‐
ted area.
► Dispose of fuel properly in accordance with
local environmental requirements.
► If a manual fuel pump is fitted: Press the man‐
ual fuel pump at least 5 times.
► Start the engine and run it at idling speed until
it stops.
► Remove saw chain and guide bar; clean and
spray with protective oil
► Thoroughly clean the machine - pay special
attention to the cylinder fins and air filter
► When using biological chain oil (e.g. STIHL
BioPlus), fill the lubricant oil tank
► Store the machine in a dry and secure location
Keep out of the reach of children and other
unauthorized persons
22 Checking the Chain
Sprocket
► Disengage the chain brake: Pull the hand
guard toward the front handle.
► Remove chain sprocket cover, saw chain and
guide bar
21 Storing the Machine
1
0458-506-0121-C
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