故障现象:一辆长江750发动机在各种转速时工作不正常,消声器发出无节奏突突声并冒黑烟,同时伴有放炮声,急加速时现象加重。检查该缸分线火花,火花强烈,更换火花塞后发动机工作无明显变化。 故障分析排除:由于是单缸出现混合气过浓现象,所以空气滤清器滤网过脏、阻风门关闭这两个原因不 Symptoms: a Yangtze River 750 engine at various speeds when not working properly, muffler emits rhythmic bursts of sound and black smoke, accompanied by blasting sound, the phenomenon of accelerated acceleration. Check the cylinder line sparks, sparks strong, after replacing the spark plug engine work no significant change. Failure Analysis and Elimination: As there is a single cylinder appears mixed gas too thick phenomenon, so the air filter mesh dirty, choke closed these two reasons