Welcome. Today's film shows the construction of the bevel gear from the internal combustion scythe.

Try the wire brush to clean: https://s.click.aliexpress.com/e/_ACPLg6

See also my other films:
Brushcutter:    • 6 teeth brush cutter head Blade blade...  
Stihl ms 270:    • Stihl MS 270 chainsaw  
Migomat from Allegro:    • Welder IDEAL MIGOMAT 200 MMA MIG MAG ...  
Siphon sandblaster: https: //   / watch   V = 2p5ZG6BTiLc & t = 12s