Singer 107 W1 Stitch Length not changing

[ohLyssa]

I recently inherited a Singer 107 w1 and I am trying to get it all set up. Everything seems to be in working order, except when I turned the dial to change the stitch length, it lengthened the stitches to just over 4 per inch and now it won't change at all. The zig zag still works fine and it's not skipping any stitches. I tried the adjustments it says to do in the manual (pictured below) but that didn't do anything. The only thing a did notice was that the tip of the stitch dial rod is slightly bent (pictured below), but I'm not sure if that is major enough to keep it from adjusting at all. Does anyone have any experience with this machine? I can't find any information online other than adjusting those two screws. 

[Constabulary]

are all the parts as shown in your diagram present (See text / parts list)? The tip on your adjustment rod is damaged as you already noticed, tip should be very sharp (see picture below). Not sure how much this affects the stitch length regulation. Is the small stud inside the adjustment knurled knob present? Is the coarse threading at end of the top shaft in good order? Please post some pictures.

edit:

Quick picture of the stud from my 107w1 rod and the top shaft threading. Stud slides inside the coarse threading.

Edited December 17, 2025 by Constabulary

[Wizcrafts]

@ohLyssa

The taper on the end of the stitch length rod is what does the adjusting. You need to get somebody with a machine shop to turn the rod and recreate a nice long taper that ends in a sharp point. That system is long obsolete. I have the same machine and baby the adjuster any time I move it.

[ohLyssa]

@Constabulary

I added some pics, they both seem to be in working order. 

 

@Wizcrafts

Thank you so much! I'll see if anyone in the shop can do that for me or if I can scrounge a replacement part. 

[Constabulary]

make sure the whole machine incl rod and coarse threading is well oiled and the stitch length mechanism parts are not gummed with old oil.