Makita EN4950H Original Instruction Manual

Also see for EN4950H: Original instruction manual Original instruction manual Instruction manual Instruction manual Technical manual

Contents

Makita EN4950H Original Instruction Manual Manual pdf 25 page image

25Before making a request for repairs, check a trouble for yourself. If any abnormality is found, control your machine according to the descriptionof this manual. Never tamper or dismount any part contrary to the description. For repairs, contact Authorized Service Agent or local dealership.State of abnormality Probable cause (malfunction) RemedyEngine does not startFailure to operate primer pump Push 7 to 10 timesLow pulling speed of starter rope Pull stronglyLack of fuel Feed fuelClogged fuel filter CleanBroken fuel tube Straighten fuel tubeDeteriorated fuel Deteriorated fuel makes starting more difficult.Replace with new one. (Recommendedreplacement: 1 month)Excessive suction of fuel Set throttle lever from medium speed to highspeed, and pull starter handle until enginestarts. Once engine starts, cutting bladesstart moving. Pay full attention to cuttingblades.If engine will not start still, remove spark plug,make electrode dry, and reassemble them asthey originally are. Then, start as specified.Detached plug cap Attach securelyContaminated spark plug CleanAbnormal clearance of spark plug Adjust clearanceOther abnormality of spark plug ReplaceAbnormal carburetor Make request for inspection and maintenance.Starter rope cannot be pulled Make request for inspection and maintenance.Abnormal drive system Make request for inspection and maintenance.Engine stops soonEngine speed does not increaseInsufficient warm-up Perform warm-up operationChoke lever is set to “ ” although engine iswarmed up.Set to “ ”Clogged fuel filter Clean or replaceContaminated or clogged air cleaner CleanAbnormal carburetor Make request for inspection and maintenance.Abnormal drive system Make request for inspection and maintenance.Cutting blade does not move Inappropriate angle of cutter unit Make sure the angle lock engages properly.Loosened cutting blades-tightening nut Tighten securelyTwigs caught by cutting blades. Remove foreign matterAbnormal drive system Make request for inspection and maintenance.Main unit vibrates abnormallyStop engine immediatelyBroken, bent or worn cutting blades Replace cutting bladesLoosened cutting blades-tightening nut Tighten securelyAbnormal drive system Make request for inspection and maintenance.Cutting blades do not stop immediatelyStop engine immediatelyHigh idling rotation AdjustDetached throttle wire Attach securelyAbnormal drive system Make request for inspection and maintenance.Engine does not stopRun engine at idling, and set choke leverto “ ”Detached connector Attach securelyAbnormal electric system Make request for inspection and maintenance.When the engine does not start after warm-up operation:If there is no abnormality found for the check items, open the throttle by about 1/3 and start the engine.TROUBLESHOOTINGStop engine immediately