Fixing this Noisy Singer 221K Featherweight Vintage Sewing Machine

I was servicing this beautiful little Singer Featherweight and I noticed it was making a strange noise, unlike a typical silky smooth Featherweight.

I show the troubleshooting procedure and repair of this particular issue.

Subjects covered in this video are listed below in the index.

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Index: 0:00 - Introduction 0:51 - The cause is not what I initially thought 2:31 - An interesting find 4:45 - I found the problem 6:57 - Fixing the issue 9:06 - How to properly install a feed dog 12:56 - Back to the fix - explaining how the feed mechanism works 19:36 - Testing 21:13 - Conclusion and thanks ... https://www.youtube.com/watch?v=Xl8SH97VlbA