► 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.
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.
21.3 Installing the Spark Plug
► Screw home the spark plug, fit the boot and
press it down firmly.
► Fit the carburetor box cover.
22 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
23 Checking and Replacing
the Chain Sprocket
► Remove the chain sprocket cover, chain and
guide bar.
► Disengage the chain brake: Pull the hand
guard towards the front handle.
23.1 Replace the chain sprocket
–
after using two saw chains or sooner
–
if the wear marks (arrows) on the sprocket are
deeper than approx. 0.5 mm since this would
reduce the life of the chain. You can use a
gauge (special accessory) to check the depth
of the wear marks.
It is best to use two saw chains in rotation with
one sprocket.
STIHL recommends the use of original STIHL
sprockets to ensure correct operation of the
chain brake.
► Use a screwdriver to remove the E-clip (1).
► Remove the washer (2).
► Remove the rim sprocket (3).
► Examine the splines on the clutch drum (4) – if
the wear marks are severe, fit a new clutch
drum.
► If the machine has a QuickStop Super chain
brake, first press the throttle trigger lockout.
Then pull the clutch drum with needle cage (5)
off the crankshaft.
English 22 Storing the Machine
30 0458-567-0121-B
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