• If waste gets stuck and causes blockagearound the intake air cooling vent orbetween the cylinder fins, it may cause theengine to overheat, and that in turn maycause mechanical failure on the part of thebrushcutter.n PROCEDURES TO BE PERFORMEDAFTER EVERY 100 HOURS OF USE1. Remove the muffler, insert a screwdriverinto the vent, and wipe away any carbonbuildup. Wipe away any carbon buildup onthe muffler exhaust vent at the same time.2. Tighten all screws, bolts, and fittings.3. Check to see if any oil or grease hasworked its way in between the clutch liningand drum, and if it has wipe it away usingoil-free, lead-free gasoline.IMPORTANTn INTAKE AIR COOLING VENT• Never touch the cylinder, muffler, orspark plugs with your bare handsimmediately after stopping the engine.The engine can become very hot whenin operation, and doing so could resultin severe burns.• When checking the brushcutter to makesure that it is okay before using it,check the area around the muffler andremove any wood chips or leaves whichhave attached themselves to thebrushcutter. Note that failing to do socould cause the muffler to becomeoverheated, and that this in turn couldcause the brushcutter to catch on fire.Always make sure that the muffler isclean and free of wood chips, leaves,and other waste before use.• Check the intake air cooling vent and thearea around the cylinder cooling fins afterevery 25 hours of use for blockage, andremove any waste which has attached itselfto the brushcutter. Note that it is necessaryto remove the plug guard shown in Figure20 in order to be able to view the upperpart of the cylinder.WARNINGMaintenanceStorage• Aged fuel is one of major causes of enginestarting failure. Before storing the unit,empty the fuel tank and run the engine untilit uses all the fuel left in the fuel line andthe carburetor. Store the unit indoor takingnecessary measures for rust prevention.17