Storing The Machine; Checking And Replacing The Chain Sprocket - Stihl MS 291 C-Q Manual De Instrucciones

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N Install the fan housing and shroud
Replacing broken rewind spring
N Remove the rope rotor as described
for "Replace torn starter rope"
The broken pieces of spring may
still be under tension and can
spring apart unexpectedly on
removal from the fan housing –
risk of injury! Wear face shield
and protective gloves
N Carefully pry out the broken pieces
of spring with a screwdriver
N
Apply a few drops of non-resinous
oil to the new replacement spring
N Position the replacement spring
with frame in the fan housing – the
anchor loop (arrow) must be located
over the retaining lug in the fan
housing
N
Apply suitable tools (screwdriver,
punch, etc.) to the recesses and
push the spring into its seat in the
fan cover – the spring slides out of
the frame
N Refit the rope rotor, tension the
rewind spring
N Install the fan housing and shroud
46

Storing the Machine

For periods of 3 months or longer
N Drain and clean the fuel tank in a
well ventilated area.
N Dispose of fuel properly in
accordance with local
environmental requirements.
N Run the engine until the carburetor
is dry – this helps prevent the
carburetor diaphragms sticking
together.
N Remove the saw chain and guide
bar, clean them and spray with
corrosion inhibiting oil.
N Thoroughly clean the machine –
pay special attention to the cylinder
fins and air filter.
N If you use a biological chain and bar
lubricant, e.g. STIHL BioPlus,
completely fill the chain oil tank.
N Store the machine in a dry, high or
locked location, out of the reach of
children and other unauthorized
persons.
Checking and Replacing
the Chain Sprocket
N Remove chain sprocket cover, saw
chain and guide bar.
N Release chain brake – pull hand
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 0.02 in (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.
Use only STIHL original chain sprockets
to help ensure reliable functioning of the
chain brake.
MS 291 C-Q