If the unit runs under low load, the following faults will occur with the extension of running time:
1. The piston-cylinder liner is not well sealed, the oil goes up and burns into the combustion chamber, and blue smoke is emitted from the exhaust.

Donec orci lectus, aliquam ut, faucibus non, euismod id, nulla. Vestibulum eu odio. Donec mi odio, faucibus at, scelerisque quis, convallis in, nisi. Vestibulum rutrum, mi nec elementum vehicula.