27TROUBLESHOOTINGBefore 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 times.Low pulling speed of starter rope. Pull strongly.Lack of fuel. Feed fuel.&ORJJHGIXHO¿OWHU Clean it.Disconnected fuel tube. Connect fuel tube properly.Bent fuel tube. Straighten fuel tube.Deteriorated fuel. 'HWHULRUDWHGIXHOPDNHVVWDUWLQJPRUHGLI¿FXOWReplace with new fuel. (Recommendedreplacement: 1 month).Excessive suction of fuel. Set throttle control to medium or high speed,and pull starter handle until engine starts.Once engine starts, saw chain starts rotating.Pay full attention to saw chain.If engine still does not start, remove sparkplug, dry the electrode, and reassemblethem as they originally were. Then, start asVSHFL¿HGDetached plug cap. Attach securely.Contaminated spark plug. Clean it.Abnormal clearance of spark plug. Adjust clearance.Other abnormality of spark plug. Replace it.Abnormal 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 increase,QVXI¿FLHQWZDUPXS Perform warm-up operation.&KRNHOHYHULVVHWWR³&/26(´DOWKRXJKengine is warmed up.6HWWR³23(1´&ORJJHGIXHO¿OWHU Clean it.Contaminated or clogged air cleaner. Clean it.Abnormal carburetor. Make request for inspection and maintenance.Abnormal drive system. Make request for inspection and maintenance.Chain oil is not supplied.The oil tank is empty. Fill the oil tank with chain oil.The chain oil feed port is dirty. Clean the chain oil feed port on the unit andguide bar.The adjusting screw of the chain oil feed rateis improperly set.Set the adjusting screw properly.Saw chain does not rotateStop engine immediatelyThe guide bar is bent or damaged. Replace the guide bar.Foreign matter caught by saw chain. Remove foreign matter while the enginestopped.Abnormal drive system. Make request for inspection and maintenance.The equipment vibrates abnormallyStop engine immediatelyBroken, bent or worn guide bar. Replace guide bar.Loosened saw chain. Adjust the saw chain tension.Abnormal drive system. Make request for inspection and maintenance.Saw chain does not stopStop engine immediatelyHigh idling rotation. Adjust idle speed.Throttle control wire problem. Ask service center to replace it.Abnormal drive system. Make request for inspection and maintenance.Engine does not stopRun engine at idling, and set choke leverto CLOSEDetached connector to the I-O switch. Attach securely.Abnormal 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 checked items, open the throttle by about 1/3 and start the engine.