► Insert air filter (3).
► Position the filter cover (2) so that the locking
tabs (5) engage with the recesses (4).
► Close the filter cover (2).
The filter cover (2) engages in position with an
audible click.
18.3 Cleaning the Spark Plug
► Shut off the engine.
► Allow trimmer to cool down.
► Pull off the spark plug boot (1).
► If the area around the spark plug (2) is soiled:
Clean the spark plug (2) with a cloth.
► Unscrew the spark plug (2).
► Clean the spark plug (2) with a cloth.
► If the spark plug (2) is corroded: Install a new
spark plug (2).
► Insert and tighten down the spark plug (2)
firmly.
► Press the spark plug boot (1) firmly home.
18.4 Adjusting standard setting
► Shut off the engine.
► Turn the high speed screw H counterclockwise
up to the limit stop.
► Turn the high speed screw H 1 1/2 turns coun‐
terclockwise.
► Turn the low speed screw L clockwise as far
as it will go.
► Turn the low speed screw L one turn counter‐
clockwise.
18.5 Adjusting Idle Speed
► Carry out the standard setting.
► Start the engine.
► Warm up the engine by opening and closing
the throttle for about 1 minute.
Engine stops while idling
► Turn the idle speed screw (LA) clockwise until
the cutting attachment begins to rotate.
► Turn the idle speed screw (LA) one full turn
counterclockwise.
Erratic idling behavior or poor acceleration
► Turn the low speed screw (L) clockwise or
counterclockwise until the engine runs and
accelerates smoothly.
Cutting attachment rotates when engine is idling
► Turn the idle speed screw (LA) counterclock‐
wise until the cutting attachment stops rotat‐
ing.
► Turn the idle speed screw (LA) one full turn
counterclockwise.
18.6 Clearing the Combustion
Chamber
► Pull off the spark plug boot (1).
► Unscrew the spark plug (2).
► Dry the spark plug (2).
English 18 Troubleshooting
18 0458-733-0121-C
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