(6) Attention should be paid to pre-lubrication when starting the engine, because when the engine is turned off, most of the oil in the lubrication system flows to the oil pan, and the surfaces of each moving pair are in dry friction and semi-dry friction. If the engine is started immediately, it will inevitably intensify The wear rate of parts such as cylinders is high, so when starting, first shake the crankshaft dozens of times, so that the surface of the moving pair can be lubricated in advance.(7) Warm up the engine for a period of time after starting the engine, because the engine temperature is low at this time, and the cylinder and other parts have not been fully lubricated, otherwise the wear of the cylinder liner, piston, piston ring, journal and bearing bush will be accelerated. When the engine temperature reaches 40°C, it will start and it will be put into operation at 60°C.(8) It is forbidden to work overloaded for a long time.(9) It is forbidden to run the engine rapidly for a long time. Because when the engine is running rapidly for a long time, the atomization of the fuel injector is poor, the fuel and air are mixed unevenly, and the combustion is incomplete, and the cylinder is prone to carbon deposits, which aggravates the wear of the cylinder. In addition, long-term idling also accelerates wear and tear.