We read the manual, everything is written in 2022 there. Lew oil hummer - go. Service workers do not scold him. Be sure to do a run-in (mixture 1:20) and then, during normal operation, a mixture of 1:40 with 92m gasoline. In no case do not saw with a blunt chain. Idling twirled weaker - well, that's enough. Check spark plug and filter. We clean all channels from sawdust. In short, we serve and then the saw will live for many years. And when something flies, there are any spare parts in the middle town. If you really want to - you can adjust the carburetor to higher speeds yourself or in the service. But I don’t need it yet - there are no plans to cut down trees yet.