Yup, I'd say you need to rewire that machine before something awful happens.....
So, now I have a question. I just bought a 15-91 in a cabinet and the ends of the wires don't look wonderful. .... not as bad as this FW but I think it would be good to replace the wiring. I looked on sew-classic for a controller for one of my FWs and a bobbin winder tire for the 15-91 and noticed wire..... there is 18/2 SPT-1 and 18/2 SPT-2. What's the difference??? other that 10cents more per foot? 18 gauge is 18 gauge..... what's the SPT-1 and SPT-2 stand for?
Anyone out there that can answer my question?