cjr

I am having trouble adjusting tension on Singer 328. Machine is kept very clean and oiled regurlarly." Timing" was supposedly off about 6 months ago. Was in shop twice. I'm trying to quilt a very special quilt for our grandmother and want to use this machine as it was my mothers.

bottom stitching looks pretty good. On the top I see the loop from the bottom which should be between layers of fabric.. i have done lots of test runs, changed thread, bobbins, adjusted tension probably 50-75 times. Also I tightened screw on bobbon case about 1/4 turn. i am using cotton fabrics and warm & natural fabric. Help Please!!

Thanks in advance for your suggestions.