Makita EM4250CA Instruction Manual

Also see for EM4250: Instruction manual Parts Breakdown Instruction manual

Contents

troubleshooting

Makita EM4250CA Instruction Manual Manual pdf 23 page image

23TROUBLESHOOTINGBefore making a request for repairs, check a trouble for yourself. If any abnormality is found, control your machine according to thedescription of this manual. Never tamper or dismount any part contrary to the description. For repairs, contact Authorized Service Agent orlocal dealership.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.State of abnormality Probable cause (malfunction) RemedyFailure to operate primer pump Push 7 to 10 times.Low pulling speed of starter rope Pull strongly.Lack of fuel Feed fuel.Clogged 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, cutter bladestarts rotating. Pay full attention to cutterblade.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 maintenanceEngine does not startAbnormal drive system Make request for inspection and maintenanceInsufficient warm-up Perform warm-up operationChoke lever is set to “CLOSE” although engineis warmed up Set to “OPEN”Clogged fuel filter CleanContaminated or clogged air cleaner CleanAbnormal carburetor Make request for inspection and maintenanceEngine stops soonEngine speed does not increaseAbnormal drive system Make request for inspection and maintenanceLoosened cutter blade-tightening nut Tighten securelyTwigs caught by cutter blade ordispersion-preventing cover Remove foreign matterCutter blade does not rotateAbnormal drive system Make request for inspection and maintenance.Broken, bent or worn cutter blade Replace cutter bladeLoosened cutter blade-tightening nut Tighten securelyShifted convex part of cutter blade and cutterblade support fitting Attach securelyMain unit vibrates abnormally.Abnormal drive system Make request for inspection and maintenanceHigh idling rotation AdjustDetached throttle wire Attach securelyCutter blade does not stop immediately.Abnormal drive system Make request for inspection and maintenanceDetached connector Attach securelyAbnormal electric system Make request for inspection and maintenance.Engine does not stop.Stop engine immediatelyStop engine immediatelyStop engine immediatelyRun engine at idling, and set chokelever to CLOSE.