这台新小四轮拖拉机为何爬坡就熄火？新吉一台新小四轮拖拉机爬坡时总要自动熄火。刚熄火时扳动减压手柄，缸内压力无变化，发动机也启动不着。１０ｍｉｎ（分）后，再扳动减压手柄，减压又有效了，发动机也能轻易启动着火。但一起步爬坡，就又自动熄火。在对气门间隙进行... Why does this new small four-wheeled tractor stall? Xinji a new small four-wheel tractor always have to turn off automatically when climbing. Just turn off the pressure when the handle is pulled, the pressure in the cylinder no change, the engine can not start. 10min (minutes), then pull the decompression handle, decompression and effective, the engine can easily start the fire. However, climbing together, it automatically turn off. In the valve clearance for ...