15STORAGEMAINTENANCE SCHEDULEGeneral Engine assembly,screws and nutsVisual inspection for damage and tightnessCheck for general condition and securityAfter each refuelling Throttle leverSafety lock keySTOP switchFunctional checkFunctional checkFunctional checkDaily Air filterCooling air ductCutting toolIdling speedTo be cleanedTo be cleanedCheck for damage and sharpnessInspection (cutting tool must not move)Weekly Spark plugMufflerInspection, replace if necessaryCheck and if necessary clean the openingQuarterly Suction headFuel tankTo be replacedTo be cleanedShutting down procedure Fuel tankCarburetorEmpty fuel tankOperate until engine runs out of fuelFAULT LOCATIONFault System Observation CauseEngine not starting orunder difficultiesIgnition system Ignition spark is present Faulty fuel supply or compression system, mechanical defectNo ignition spark STOP-switch operated, wiring fault or short circuit, sparkplug or connector defective, ignition module faultyFuel supply Fuel tank filled Incorrect choke position, carburetor defective, suction head(gas line filter) dirty, fuel supply line bent or interruptedCompression Inside of engine Cylinder bottom gasket defective, crankshaft seals damaged,cylinder or piston rings defectiveOutside of engine Improper sealing of spark plugMechanical fault Starter not engaging Broken starter spring, broken parts inside of the engineWarm start problems Tank filledIgnition spark existingCarburetor contaminated, have it cleanedEngine starts but diesimmediatelyFuel supply Tank filled Incorrect idling adjustment, suction head or carburetorcontaminatedFuel tank vent defective, fuel supply line interrupted, cable orSTOP-switch faultyInsufficientperformanceSeveral systems maysimultaneously be affectedEngine idling Air filter contaminated, carburetor contaminated, mufflerclogged, exhaust duct in the cylinder cloggedWhen keeping the machine in storage for a long time, drain fuel from–the fuel tank and carburetor, as follows: Drain all fuel from the fueltank.Remove the spark plug and add a few drops of oil into the spark plug–hole. Then, pull the starter gently to confirm that oil film covers theengine inside and tighten the spark plug.Clear dirt or dust from the cutter blade and outside of engine, wipe–them with a oil-immersed cloth and keep the machine at a place asdry as possible.Abide by Federal and Local regulations for safe storage and handling–of gasoline.Drain fuelHumidity