The failure phenomenon of blue smoke is: light blue smoke is often seen at the tail of the exhaust muffler during the working process of the engine, and the organic oil is consumed too quickly. The cause of the failure may be: the oil level is too high; the compression pressure of the cylinder is lower than the specified value; the gap between the piston, the piston and the cylinder barrel increases.

 

2. The exhaust pipe emits black smoke

 

The fault phenomenon of black smoke is: when the engine is working, the exhaust pipe emits black smoke, and the pungent gasoline smell can be smelled, which is more obvious when accelerating. The cause of the failure may be: the mixture is too thick; the spark plug is not working well; the ignition is too late.

 

3. White smoke from the exhaust pipe

 

The original fault phenomenon of white smoke is: when the engine is working, the exhaust pipe emits white smoke. The cause of the failure may be: the fuel contains moisture; the cylinder or muffler contains moisture.