Hi, read the manual
Either disassemble the cylinder head cover, disassemble the spark plug, pull the pull plate (start handle), let the piston reach the highest point, and then adjust the valve clearance. Their gaps are about 0.10 mm for the intake valve and 0.15 mm for the exhaust valve, and a piece of A4 paper is about 0.05 mm thick. The only tools needed are two torx wrenches. Hope it's useful to you.
The engine oil and gasoline need to be adjusted in a ratio of 1:50. The operation is nothing more than: open the damper, open the oil circuit switch, open the power switch, and start the pull rope. That's it.
It is not recommended to buy a two-stroke engine because the fuel needs to be mixed with engine oil. Generally, the proportion will be wrong when mixing by yourself, which will affect the performance of the engine and cause a high failure rate. It is recommended to choose a four-stroke engine, which has separate engine oil and gasoline, which is more convenient to use.
Two-strokes are more widely used and easier to use abroad because foreign gas stations have ready-mixed 1:50 fuel.
The above information is provided by Germany's Saden Generator