用汽油机启动的农机具,有播种机、机动喷雾器等,汽油机都是采用磁电机点火装置进行点火,磁电机一旦发生故障,就会影响发动机的正常启动。一、磁电机无火1.主要原因:低压电路断路、短路,高压电路断路、短路或接触不良;电容器击穿等。2.排除办法:(1)检查断电器触点有无油污、烧蚀、接触不良。若烧蚀时,可用白金砂条打磨触点;若白金触点烧蚀严重其厚度小于0.5 mm时,应重新铆触点。检查电容器是否击穿,其方法有几种,一是用比较法判断,可换一新 Start with petrol engine farm machinery, planter, mobile sprayer, etc., gasoline engines are used magneto ignition device ignition, magneto in the event of failure, it will affect the normal start of the engine. First, the magneto no fire 1 main reasons: low voltage circuit open, short circuit, high voltage circuit open circuit, short circuit or poor contact; capacitor breakdown and so on. 2. Remedy: (1) Check whether there is oil stains, ablation, poor contact. If ablation, white sand can be used to polish the contact point; if the platinum contact ablation serious thickness of less than 0.5 mm, the riveting contact should be re-opened. Check whether the breakdown of the capacitor, there are several ways, one is judged by comparative law, you can change