检查点火线圈是否良好可在机器上进行。打开点火开关,确认低压线路正常后,从分电器盖中央拔出高压线。距缸体3-5mm。用起子拨动断电器触点,不断地张合,高压线与缸体间有蓝白色火花跳过,且伴有清脆声响,说明点火线圈性能良好。 如无火花,且确认高压线正常,则说明点火线圈失效。发动机运转中,检查点火线圈好坏亦可根据温度判断。微热者良好;烫手者不良或损坏。另外,将可疑的点火线圈装在点火系统完好的汽油机上进行跳火检查,可鉴别出好坏。
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