Bobbin/raceway and timing problem; Necchi 3577
ok.....without the bobbin case in and a fresh needle in, turn the machine to the side and turn the crank wheel counter clockwise, the hook of the machine should bypass the cusp of the needle, thats the part of needle that is by the eye and curves in alittle, if it is not the timing is off, try to adjust this by adjusting the needle bar, this is not a easy easy repair but takes patients, im assuming that, thats where it was thrown off timing
durkopp 17-1-1 threading diagram
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