How to thread your 4 thread Baby Lock Serger with the Revolution Air Threading!

[@marykreps331]

Excellent video

[@Leila.549]

can I ask a question ? What is the use of A B C D on the serger? I just bought this serger and I don't know where those letters are used. can you guide me

[@lillianamichaels4228]

Can you please
show me the 800dl serger how to thread?

[@dianeanthony9300]

I can’t get the thread to go into the ports. I place it in the port, but it won’t go down. Any suggestions?