Chain saws require gasoline, engine oil and chain saw chain lubricants:

1. Gasoline can only use unleaded gasoline above 90. When adding gasoline, the fuel tank cap and the fuel filler port must be cleaned before refueling to prevent debris from entering the fuel tank. Place the tall branch saw in a flat place with the fuel tank cap facing up. Do not allow gasoline to spill out when refueling. Do not fill the tank too full. After refueling, always tighten the fuel tank cap by hand.

2. The engine oil can only use high-quality two-stroke engine oil to ensure the engine has a long service life. Never use an ordinary four-stroke engine. When using other two-stroke engine oils, the model should be of tc grade quality. Poor quality gasoline or oil can damage the engine, seals, oil passages and fuel tanks.

3. Mixing of gasoline and engine oil, mixing ratio: 1:50 for two-stroke engine oil for high-saw saw engine, that is, 1 part oil plus 50 parts of gasoline; use other engine oils conforming to tc level: 1:25, ie 1 A portion of motor oil plus 25 parts of gasoline. The mixing method is to pour the oil into a fuel tank that allows fuel, then fill it with gasoline and mix it evenly. Gasoline engine oil mixture will age, and the general configuration should not exceed one month's usage. Special attention should be paid to avoid direct contact between the gasoline and the skin and to avoid the volatilized gas from the gasoline.

4. Use high-quality chain saw chain lubricant to keep the oil not lower than the oil level to reduce the wear of chains and serrations. Since the chain saw lubricant will be completely discharged into the environment, the common lubricating oil is petroleum-based, non-degradable and pollutes the environment. It is recommended to use degradable environmentally friendly chain saw oil as much as possible. Many developed countries have rigid regulations. Avoid environmental pollution.