I soaked the Zenith Carb, made in Australia for 3 days on CLR... it didn't dissolve away....
Poked a wire down all holes and blew them out.
The float had tobe resoldered, what a job for newbies........
Anyway bingo. it runs.....

https://studio.youtube.com/video/uS1fbmOEmoc/edit

I bodgied a throttle cable just to mow the front lawn....
Popping a bit..... might need proper muffler....

https://studio.youtube.com/video/OjVFzNyaAkQ/edit

I'm happy speedy

........................Keep your blades sharp......................