在正常情况下,拖拉机发动机应能一次顺利起动,有时反复几次才能起动,均属正常情况。若经多次反复起动,发动机仍不能着火,则应视为故障。发动机起动困难或不能起动是常见故障之一。当发动机出现起动故障时,首先应检查起动前的准备工作是否充分:如燃油箱是否有油,油开关是否打开,而后检查起动设备是否正常,最后查找发动机有关系统。常见原因及排除方法如下:一、燃料供给系统故障表现为燃油系不供油或供油不正常(油量少或 Under normal circumstances, the tractor engine should be able to start a smooth, sometimes repeated several times to start, are normal. If repeated after many starts, the engine still can not be on fire, it should be regarded as fault. It is one of the common faults that the engine starts hard or can not start. When the engine start failure occurs, we should first check the adequacy of the preparatory work before the start: If the fuel tank is oil, oil switch is turned on, and then check the starting equipment is normal, and finally find the engine related systems. Common causes and solutions are as follows: First, the fuel supply system failure performance is not fuel or fuel supply is not normal (less oil or