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故障20故障现象:一辆铃木SJ50QT二冲程踏板车,行驶1．2万km,车主反映车子近期难起动,在修理部更换了活塞、活塞环、火花塞等部件,没有明显好转,故障原因不明。故障诊断与检修:初步检查车辆,脚起动要加大干80％的油门才可以起动,起动电动机及电池性能良好,但是电起动不着车。检查火花塞及点火线圈,有蓝色强烈的火花,而且拉到5～7 mm时不断火,将活塞转到上止点的位置,磁电机转子上的
Fault 20 Symptom: A Suzuki SJ50QT two-stroke scooter, driving 12,000 km, the owner of the car difficult to start the recent boot, the replacement of the piston repair department, piston rings, spark plugs and other components, there is no significant improvement, the cause of the malfunction is unknown. Troubleshooting: Initial inspection of the vehicle, starting the foot to increase the dry 80% of the throttle can start, start the motor and battery performance is good, but the electric starter does not drive. Check the spark plug and ignition coil, there is a strong blue spark, and pulled to 5 ~ 7 mm constant fire, the piston to the top dead center position, the magneto rotor