SINGER W2137 - Manual (Page 15)

Be sure to set the stitch width at O, or the
needle will break in striking the toot or plate.
Push the zigzag lever 7, Fig. 13} all the way to the
left so that pointer is over 0 in stitch width window.
Set both locks, 6, as far to the left as possible.
To move locks, pull knobs slightly and slide, then
release.
SETTING THE STITCH LENGTH
The length of the stitch is regulated by the dial A shown
in Fig 14. Near 0 is the shortest stitch and 6 is the longest.
Turn the dial to the left to lengthen and to the right to shorten
the stitch.
STITCH LENGTH CHART (Approximate)
Figures on dial
0 1 2 3 4 5 6
Number of
stitches per inch No Feeding 36 20 12 9 7 5
13
Fig. 14