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3
WARNING
To reduce the risk of fire and burn injury,
use only spark plugs authorized by
STIHL. Always press the spark plug
boot (1) firmly and securely onto the
spark plug terminal (2).
Do not use a spark plug with a
detachable SAE adapter terminal (3).
Arcing may occur that could ignite
combustible fumes and cause a fire.
This can result in serious injuries or
damage to property.
Only use resistor type spark plugs
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with solid, non-threaded terminals
Installing the spark plug
Screw home the spark plug, fit the
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boot and press it down firmly.
Install the shutter and air filter.
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Fit the carburetor box cover.
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Engine Running Behavior
If engine running behavior is
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unsatisfactory even though the air filter
is clean and the carburetor is properly
adjusted, the cause may be the muffler.
Have the muffler checked for
contamination (carbonization) by your
servicing dealer.
STIHL recommends that you have
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servicing and repair work carried out
exclusively by an authorized STIHL
servicing dealer.
Storing the Machine
For periods of 3 months or longer
Drain and clean the fuel tank in a
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well ventilated area.
Dispose of fuel properly in
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accordance with local
environmental requirements.
Run the engine until the carburetor
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is dry – this helps prevent the
carburetor diaphragms sticking
together.
Remove the saw chain and guide
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bar, clean them and spray with
corrosion inhibiting oil.
Thoroughly clean the machine – pay
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special attention to the cylinder fins
and air filter.
If you use a biological chain and bar
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lubricant, e.g. STIHL BioPlus,
completely fill the chain oil tank.
Store the machine in a dry, high or
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locked location, out of the reach of
children and other unauthorized
persons.
MS 250
