i just replaced the gear on my 457. Now when i try to zig zag it seems like the motor is stressed and it just stops. I also noticed that you cannot set the straight stitch with the needle in the right needle position.
Opening up the nose part, i can see now that some other fixer screwed up the timing and that a few of the other little screws have marks left by the previous owner. I know this is a good little machine if i can just get it to go. It might just Go out the window, if i cant figure out how to get her zigging and zaggin again.
BTW the gear replacement was the easy part of this fixer upper. lol