I found this chainsaw from Japan recycle shop. It was made in Japan by RYOBI, model ESK-3500. It does not work for many reasons, and I successfully restored it. You can watch this video in the sections below.
00:24 chainsaw disassemble
00:45 chain removal
01:34 starter removal
02:00 ignition test
02:03 font handle removal
02:55 ignition removal
03:30 safety switch removal
04:45 carburetor removal
05:57 clutch drum removal
06:47 flywheel removal
07:20 muffler removal
08:24 cylinder removal
09:05 chain oil pump removal
09:29 crankshaft removal
10:01 carburetor bulb removal
10:54 ignition switch removal
11:08 stater disassemble
12:40 chainsaw components list
13:00 components cleaning
16:44 chainsaw assemble
16:58 crankshaft assemble
17:43 cylinder install
19:07 oil pump install
21:12 muffler install
21:55 vibration spring install
22:06 flywheel install
22:27 ignition install
22:55 carburetor install
24:41 spark plug install
25:05 starter assemble
27:55 carburetor filter replacement
28:20 clutch drum install
28:45 chain install
29:06 chainsaw brake assembly
30:10 how to sharpen a chainsaw
30:36 cutting test

I hope you find this video useful and enjoy it!
Furthermore, I am happy to receive feedback, suggestions to improve myself.
!!! I'm sorry for the mistake if I did in this video !!!
Thank you very much for choosing to watch my video!
Have a nice day
Gear Show