Kenmore 1218 Instructions Manual page 15

When stitching is unsatisfactory as in
figures 2 and 3, adjust the upper thread
tension. Lower thread tension requires
adjustment less frequently than the upper
thread tension.
When stitch is satisfactory, as in figure 1
and seam is badly puckered, the cause may
be tight tensions and both upper and lower
may be adjusted. (See page 28)
When adjusting the tension on the bobbin
case, make slight adjustments with a
screwdriver. (See page 28)
INCREASE TENSION
'" Turn Clockwise.
DECREASE TENSION
Turn Counter
Clockwise.
15