Engine Running Behavior - Stihl SR 440 Instruction Manual

Use resistor type spark plugs with a
N
properly tightened adapter nut.
Installing the spark plug
Screw home the spark plug, fit the
N
boot and press it down firmly.
SR 440

Engine Running Behavior

If engine running behavior is
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
servicing and repair work carried out
exclusively by an authorized STIHL
servicing dealer.
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