What is the reason why the engine rattles?

1, the foot glue is aging or loose: the foot glue is the glue block between the engine and the frame. Its function is to reduce the vibration and buffer when the engine works and fix the engine. Once these machine feet are aged or loose, the engine will shake, and in severe cases, there will be a "beep" sound. This kind of machine foot glue can only be replaced with new ones.

2. Too rich mixture: When the engine mixture is too rich, the phenomena are: it is difficult to accelerate after starting, and the engine runs unevenly; The exhaust pipe emits black smoke, and the engine is accompanied by clicking sound; Engine power decreases and fuel consumption increases. This kind of carbon deposit in Dachuan is related to the filter blockage, and generally does not need to be overhauled.

3. "Knocking on the cylinder" abnormal sound: due to poor lubrication conditions, the piston and cylinder wall are excessively worn, resulting in the clearance fit tolerance between the piston and cylinder wall exceeding the normal range. When the engine is running, the piston skirt collides with the cylinder wall, resulting in a crisp sound of "clicking", which is generally more obvious at idle speed or low speed.