Oh boy I think I am in a pickle. I purchased a singer model 15-91 that I felt was in great shape but I think I messed up the needle tension
the stitch was spot on but I have somehow messed up the tension. I tried to adjust needle tension by turning counterclockwise because it appears the needle thread was to tight and it has made no difference. I tried clockwise no difference. The bottom thread seems to be ok. Boy I sure could use your knowledge and help. Here is a picture of the machine. I tried to take pics of stitching but picture is not good. Ok, tried to post pic wouldn't post. Will try again