2 Vintage Singer Machines, 2 problems.
1) My Singer 503 has developed a loose top tension. Book says: turn tension to a higher number. The stitch looks different, but still too loose, so moving the tension doesn't solve it. I even adjusted the bobbin tension a tad. What can I try next ?
2) My Singer 99 draws fabric in, then lists (pulls) slightly to one side, then sews ok for a while, then repeats. Never replaced feed dogs in my life, is this the problem ?