First, the gasoline saw is a two-stroke power, you should pay attention to the power, transmission and cutting tools in use to ensure the normal use of the machine:

 1. Engine:

 A. For qualified gasoline and engine oil, ensure their mixing ratio (25:1);

 B. Regularly (25 hours) check and replace the air filter to check the spark plug;

 C. After each tank of oil work, you should rest for 10 minutes, and clean the loose gasket of the machine after each work to ensure heat dissipation;

 D. When storing, you must clean the body, drain the mixed fuel, and burn the fuel in the carburetor; remove the spark plug, add 1-2ml of two-stroke oil into the cylinder, pull the starter 2-3 times, and install the spark plug.

 2. Transmission: regular (25 hours) replenishment of grease

 3. Cutter: Check the gap between the upper and lower blades regularly (25 hours) and adjust them in time (the interval is the half-round thread interval of the bolt) to keep the blade sharp. Fill the blade with engine oil every hour of work, trimming diameter <=10mm.

2. What are the precautions for using the chain saw at minus 30℃?

1. The recommended fuel mixing ratio is 20:1 to 15:1 (high-quality air-cooled two-stroke oil must be used for mixing), and 10%~30% diesel (kerosene or light oil) should be added to the lubricating oil of the saw chain. ) Use after mixing to ensure proper concentration. The proportion should be determined according to the amount of oil sprayed by the saw chain and the degree of addition, but should be controlled within the range of 10% to 30%.

2. The rotating speed at idling speed should be adjusted to 2500~3000 rpm, while the idling speed at normal temperature is 2000 rpm.

 3. Fuel mixture ratio of two-stroke machinery?

 Generally, two-stroke machinery fuels are mixed with steam and engine oil (the engine oil is special oil for two-stroke engines). The ratio is standard. The ratio of steam and engine oil is about 25:1. (I recommend 20:1) depending on the usage. If it is not running at high speed for a long time during use, the concentration can be appropriately increased. If high-speed rotation is often maintained during use, the concentration should be appropriately reduced, and more oil should be added to ensure the normal lubrication of the internal running parts of the cylinder, but it should be removed in time. Lower the muffler to remove the carbon deposits in the exhaust duct to prevent excessive carbon deposits from entering the cylinder body and causing cylinder pull.