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Muffler CAUTION! Muffler is fitted with a catalytic converter designed to reduce harmful exhaust gases. WARNING:Mufflersfittedwithcatalyticconvertersgetveryhotduringuseandremainsoforsometimeafterstopping.Thisalsoap- pliesatidlespeed.Contactcanre- sultinburnstotheskin.Remembertheriskoffire! WARNING:Theinsideofthemufflercontainchemicalsthatmaybecarcinogenic.Avoidcontactwiththeseelementsintheeventofadamagedmuffler. WARNING:Bearinmindthat: Engineexhaustfumescontaincar- bonmonoxide,whichcancausecarbonmonoxidepoisoning.Forthisreasonyoushouldnotstartorrunthemachineindoors,orany- wherethatispoorlyventilated. Theexhaustfumesfromtheenginearehotandmaycontainsparkswhichcanstartafire.Neverstartthemachineindoorsornearcom- bustiblematerial! The muffler is designed to reduce the noise level and to direct the exhaust gases away from the operator. The exhaust gases are hot and can contain sparks, which may cause fire if directed against dry and combustible material. Mufflers are equipped with a special spark arrestor mesh. The mesh should be checked and, if necessary. cleaned by a servicing dealer. If the mesh is damaged, it should be replaced. If the mesh is frequently blocked, this can be a sign that the performance of the catalytic converter is impaired. Contact your servicing dealer to inspect the muffler. A blocked mesh will cause the machine to overheat and result in damage to the cylinder and piston. Muffler bolts Spark arrestor mesh CAUTION! Never use a machine that has a faulty or loose muffler. Ensure the muffler bolts are tight. Spark plug The spark plug condition is influenced by: S Incorrect carburetor adjustment. S An incorrect fuel mixture (too much or in correct type of oil). S A dirty air filter. These factors cause deposits on the spark plug electrodes, which may result in operating problems and starting difficulties. If the machine is low on power, difficult to start or runs poorly at idle speed: always check the spark plug first before taking any further action. If the spark plug is dirty, clean it and check that the electrode gap is 0.024s (0.6 mm). The spark plug should be replaced after about a month in operation or earlier if necessary. CAUTION! Always use the recommended spark plug type! Use of the wrong spark plug can damage the piston/cylinder. 0.024s (0.6 mm) 16 MAINTENANCE Air filter The air filter must be regularly cleaned to remove dust and dirt in order to avoid: S Carburetor malfunctions S Starting problems S Loss of engine power S Unnecessary wear to engine parts S ptExcessive fuel consumion Clean the filter every 25 hours, or more regularly if conditions are exceptionally dusty. Cleaning the air filter Remove the air filter cover and take out the filter. Wash it clean in warm, soapy water. Rinse thoroughly. Ensure that the filter is dry before refitting it. An air filter that has been in use for a long time cannot be cleaned completely. The filter must therefore be replaced with a new one at regular intervals. A damaged air filter must always be replaced. Bevel gear The bevel gear is filled with the right quantity of grease at the factory. However, before using the machine you should check that the bevel gear is filled three- --quarters full with grease. Use HUSQVARNA special grease. The grease in the bevel gear does not normally need to be changed except if repairs are carried out. Maintenance schedule Below you will find some general maintenance instructions. Daily maintenance S Check throttle trigger function. S Check that the stop switch works correctly. S Check that there are no fuel leaks from the engine, tank or fuel lines. S Check that the cutter does not rotate when the engine is idling. S Clean the outside of the machine. S Check that the harness is not damaged. S Check that the blade guard is not damaged or cracked. S Replace the blade guard if it is exposed to impact or is cracked. S A non- --balanced trimmer head induces heavy vibrations that may damage the machine. S Check that nuts and screws are tight. S Check that the screws that hold the bevel gear are tight. S Check that the trimmer head is tight. Weekly maintenance S Check the starter and starter cord. S Clean the carburetor area. S Clean the outside of the spark plug. Remove it and check the electrode gap. Adjust the gap to 0.024s (0.6 mm), or replace the spark plug. Use resistor spark plug Champion RCJ- --8Y or equivalent. S Clean the cooling fins on the cylinder and check that the air intake near the starter is not blocked. S Check that the bevel gear is filled with grease up to 3/4 full. Use special grease. S Clean the air filter. Monthly maintenance S Clean the fuel tank. S Clean the outside of the carburetor and the space around it. S Clean the fan and the area around it. S Check fuel lines for cracks or other damage. Change if necessary. S Change the fuel filter in fuel tank. S Check the clutch, clutch springs and the clutch drum for wear. Replace if necessary. S Check electrical wires and connections. S Replace t...