18TROUBLESHOOTINGBefore making a request for repairs, check a trouble for yourself. If any abnormality is found, control your machine according to the description of thismanual. 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) 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. (Recommended re-placement: 1 month)Engine does not startExcessive suction of fuel Set throttle lever from medium speed to highspeed, and pull starter handle until enginestarts.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 maintenanceAbnormal drive system Make request for inspection and maintenanceInsufficient warm-up Perform warm-up operationChoke lever is set to “CLOSE” although engineis warmed upSet to “OPEN”Clogged fuel filter CleanEngine stops soonEngine speed does not increaseContaminated or clogged air cleaner CleanAbnormal carburetor Make request for inspection and maintenanceAbnormal drive system Make request for inspection and maintenanceDetached throttle wire Attach securelyAbnormal drive system Make request for inspection and maintenanceEngine does not stop. Detached connector Attach securelyAbnormal electric system Make request for inspection and maintenance.Run engine at idling, and set choke lever toCLOSE.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.