Cleaning the air filterI I-- Remove the filter cover (W1) (2 screws).Loosen the screws on the air filter (F/2) and remove fromintake manifold.Loosen the screw on the prefilter cover (F/3) and remove.-- Remove prefilter (F/4).IMPORTANT:Cover the intake opening with a clean cloth to prevent dirtparticles from getting into the carburetor.- Pry apart the top and bottom of the air filter as shown inFigure G.CAUTION:To prevent injury to the eyes, do NOT blow out dirt partl-cles!Do not use fuel to clean the air fllter and pretllter.Replacing the spark plug @ @CAUTION:Do not touch the spark plug or plug cap if the engine isrunning (high voltage).Switch off the engine before starting any maintenanceworkA hot engine can cause burns. Wear protective gloves!The spark plug must be replaced in case of damage to theinsulator, electrodeerosion (bum) or if the electrodesare verydirty or oily.- Remove the filter cover (see 'Cleaning the air filter').- Pull the plug cao (H/1) off the spark plug. Use only thecombinationwrench supplied with the saw to remove thespark plug.CAUTION: Use only the following spark plugs:BOSCH WSR 6F or NGK BPMR ?A.-- Clean the air filter and prefilter with a soft brush.If the filter is very dirty, clean it in lukewarm water withdishwashingdetergent.- Let the air filter dry completely.- Put the top and bottom sections back together.- Before reinstalling the air filter, check the intake openingand remove any dirt particles. If there are any, removethemwith a brush.Clean frequently (several times a day) when working in verydusty or dirty conditions. Fullenginepower is possibleoniywitha clean air filter and prefilter!CAUTION: If the air filter or prefilter becomes damaged,replace immediately!Pieces of cloth or large dirt particles can destroy theengine!Checking the ignition spark- Pressthe loosenedspark plug with the ignition cable firmlyconnected against the cylinder using insulated pliers (notnear the spark plug opening).OWOFF switch in the "I' (ON)position.Pull the starter cable hard.--If the function is correct, an ignition spark must be visible nearthe electrodes.27