To adjust and replace the engine saw blade. 

Hello, I'm Yong Three.^^
Fundamentals for using engine saws.
When you cut down a tree, the saw blade loosens,
If it doesn't work, we need to replace the saw blade, right?
Adjust the saw blade so that even beginners can learn and follow easily.
How to replace it with a new saw blade!!
Let's check it out on video.^^
To adjust and replace the engine saw blade.