Storing The Machine; Checking And Replacing The Chain Sprocket - Stihl MS 291 Instruction Manual

English
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.
Use resistor type spark plugs with a
N
properly tightened adapter nut.
Installing the spark plug
Insert the spark plug through the
N
grommet and screw it in by hand.
Tighten down the spark plug, fit the
N
boot and press it down firmly.
Install the shroud – see "Shroud".
N
38

Storing the Machine

1
For periods of 3 months or longer
Drain and clean the fuel tank in a
N
well ventilated area.
Dispose of fuel properly in
N
accordance with local
environmental requirements.
Run the engine until the carburetor
N
is dry – this helps prevent the
carburetor diaphragms sticking
together.
Remove the saw chain and guide
N
bar, clean them and spray with
corrosion inhibiting oil.
Thoroughly clean the machine – pay
N
special attention to the cylinder fins
and air filter.
If you use a biological chain and bar
N
lubricant, e.g. STIHL BioPlus,
completely fill the chain oil tank.
Store the machine in a dry, high or
N
locked location, out of the reach of
children and other unauthorized
persons.
Checking and Replacing the
Chain Sprocket
Remove chain sprocket cover, saw
N
chain and guide bar.
Release chain brake – pull hand
N
guard against the front handle
Fit new chain sprocket
after use of two saw chains or
–
earlier
if the wear marks (arrows) are
–
deeper than 0.5 mm – otherwise the
service life of the saw chain is
reduced – use check gauge (special
accessory) to test
Using two saw chains in alternation
helps preserve the chain sprocket.
STIHL recommends use of original
STIHL chain sprockets in order to
ensure optimal functioning of the chain
brake.
MS 271, MS 271 C, MS 291, MS 291 C