I don' have the Jazz II, I have the lst one BL Jazz and I am using a metallica 90/14 needle and I put my feed dogs down, but I leave the stitch width on 3 and stitch length on 3. I also tightened my bobbin just a little and my top tension is on 7.5. The only time I get loops or loose stitches now, is when I move the fabric faster than I am moving the machine. I enclosed 3 pics to show you, I hope it helps. The lst is the top, the 2nd is the bottom and 3rd is foot I am using. These are just practice hopefully I get better and more consistent with it.
Last edited by Jerseyrayne; 03-22-2021 at 07:46 AM.