MAINTENANCEEnglish – 23Oiling the air filterAlways use special filter oil. Filter oil contains a solvent tomake it spread evenly through the filter. You should thereforeavoid skin contact.Put the filter in a plastic bag and pour the filter oil over it.Knead the plastic bag to distribute the oil. Squeeze theexcess oil out of the filter inside the plastic bag and pour offthe excess before fitting the filter to the machine. Never usecommon engine oil. This would drain through the filter quitequickly and collect in the bottom.Spark plugThe spark plug condition is influenced by:• Incorrect carburettor adjustment.• An incorrect fuel mixture (too much or incorrect type ofoil).• A dirty air filter.These factors cause deposits on the spark plug electrodes,which may result in operating problems and startingdifficulties.If the machine is low on power, difficult to start or runs poorlyat idle speed: always check the spark plug first before takingany further action. If the spark plug is dirty, clean it and checkthat the electrode gap is 0.5 mm. The spark plug should bereplaced after about a month in operation or earlier ifnecessary.CAUTION! Always use the recommended spark plug type!Use of the wrong spark plug can damage the piston/cylinder.Check that the spark plug is fitted with a suppressor.