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► Open the shroud locks (1) by turning them 1/4 turn
counter-clockwise with the combination wrench.
► Remove the shroud (2).
► Remove the spark plug boot (3) by pulling the tab (4).
► Clean the area around the spark plug with a damp cloth or
soft brush.
► Unscrew the spark plug.
► Clean the spark plug with a damp cloth.
► If the spark plug is corroded, install a new spark plug.
► If damp, dry the spark plug thoroughly before re-inserting
it.
► Insert the spark plug and tighten it down firmly.
► Connect the spark plug boot (3) and press it down firmly.
► Place the shroud in position.
► Tighten the shroud locks until you hear an audible click.
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21.5 Cleaning the Spark Arresting Screen
WARNING
To reduce the risk of fire from the emission of hot particles,
Never operate your chain saw with a missing or damaged
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spark arresting screen. Never modify your muffler or spark
arresting screen.
NOTICE
Some state or federal laws or regulations may require a
properly maintained spark arrester for certain uses.
To clean the spark arrester screen:
► Shut off the engine, @ 15.
► Engage the chain brake, @ 12.1.
► Allow the chain saw and muffler to cool down.
► Remove the screw (1).
► Pull out spark arresting screen (2)
► Clean the spark arresting screen.
► If the spark arresting screen is clooged or heavily
carbonized, have it replaced by an authorized STIHL
servicing dealer.
► Re-insert the spark arresting screen and tighten the
screw.
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21 Cleaning
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