Help Singer model 237-timing problem??
I have a Singer 237 Zig Zag sewing machine that has a “timing problem.
When I use the zig zag stitch, the machine sometimes skips a stitch or two. It appears the bottom thread is not picked up. A call to the service repair shop informed me the timing has to be adjusted but refused to tell me where or how to adjust it, even though I told them I was very familiar with my machine. I would greatly appreciate any help in locating the timing adjustment screw/ whatever. I am also trying to locate a service manual.
Thanks in advance for any help you can offer.