Usually 120 hours.
Use two glass test tubes with a diameter of 0.5 cm and a length of 20 cm, and fill them with 19 cm of new engine oil and used engine oil. After sealing, reverse it. two tubes together and save. When the bubbles rise, if the difference between the two exceeds 20%, it means that the viscosity of the used engine oil has dropped too much and needs to be replaced.
Compare a drop of new engine oil and a drop of used engine oil on the white filter paper. If there are more black spots in the used oil droplets, it means the engine oil has not gone bad and should. must not be replaced; If the engine oil is dark brown, it indicates a metamorphosis and should be replaced.
Precautions for gasoline generators
When the gasoline generator is operating, due to the high temperature generated by the comDuring the combustion process, gray carbon polymers adhere to valves, valve seats and fuel injectors. , and the pistons. Failure to clean the top and other parts in time will increase fuel consumption and seriously affect the normal operation of the engine. Under normal circumstances, they should be cleaned once every 4 to 6 months.The gasoline generator engine cooling water temperature is maintained at approximately 45-65°C. If the water temperature is too low, it will cause incomplete combustion of the gasoline generator and increase the load on the machine itself. Use mineral-free “soft water” (such as distilled water, rainwater) for cooling water, and do not overuse sewage or muddy water.