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I tried a few different solutions for fitting spool pins to my 431G.

The best solution I found was to use double chainring bolts that were designed for bicycle sprockets.

These chainring bolts are 10mm in diameter and have a small 3 or 4 mm hexagonal hole in the top. They fit well in the 431G top.

The attached photo shows similar items on Amazon.

You may have to try a few spool pins to get the correct fit. I just made my own out of HDPE cutting board material on my hobby lathe.

You may have to cut or sand some of the finish off of the inside of the spool pin holes to get the chainring bolts to slide in.

You will need a small spacer to hold the top of the chainring bolts flush with the top of the machine. I bought a nylon bushing at the hardware store and cut slices to fit.

I purchased a 120V Singer 626 on Facebook Marketplace for $40.

All the gears in the machine were melted but the motor, wiring, and foot pedal were in good shape.

The motor fit perfectly in the 431G and the gear pitch was the same so I did not swap the motor gears.

I had to wire the foot pedal into the 431G cord.

I eventually purchased an electronic foot pedal to replace the mechanical one and it worked perfectly.

The stop motion wheel on the 431G is made of plastic and will crack over time.

I tested a stop motion wheel and washer clutch from a Singer 401a and they fit and worked perfectly. If the wheel ever breaks, I can replace it with the metal parts from a Singer 401a.

I was looking for a very rare Singer 431G but the only ones I found were on Etsy and they were priced between $600 and $900 U.S.

I took a chance and went to the German version of eBay (eBay.de).

I found German language listings that did not appear on eBay.com.

I found the following listing and paid around $60 USD and about $150.00 USD for shipping. So my total cost was a little over $200 USD.

The machine included the chain stitch accessories and was in good shape but it had a few common problems:

• There was no user manual.
• The spool pins were broken or missing.
• The machine needed cleaning and de-greasing.
• The needle plate pins were missing and the zigzag plate had been drilled to accommodate a machine screw to hold it in place.
• The rubber feet needed to be replaced (there are 5).
• The foot pedal wasn’t working.
• The motor was 220V which isn’t convenient in the U.S.

The restoration is described in other posts on this site.