我县有几台东方红—18型背负式机动弥雾喷粉机,在发动机怠速甚至正常运转和停机时,从汽化器通气孔里向外滴油。检查发现:浮子不能浮起,关闭进油孔,而使浮子室进油口处于开启状态。导致这种故障的主要原因是机器存放时,浮子室内的油没有放出,浮子长期浸于汽油之中。做严重侵蚀,表面组织松散,杂质积聚,使浮子重量增加,针阀不能关闭进油 My county has several Oriental Red -18 Knapsack Motor Mist Duster, the engine idling or even normal operation and downtime, drip out of the carburetor vent. Inspection found: the float can not be floated, close into the hole, leaving the floater chamber into the open state. The main reason for this failure is that when the machine is stored, the oil in the float chamber is not released and the float is immersed in the gasoline for a long time. Do serious erosion, loose surface tissue, accumulation of impurities, the float weight increase, the needle valve can not be closed into the oil