Kenmore 15243 Owner's Manual page 34

* inserting bobbin
[] Place a bobbin in the bobbin case, making sure the
thread feeds clockwise from the bobbin.
[] Draw the thread through the slot of the case.
J
J
[] Holding the latch open, position the bobbin case into the
shuttle, and then release the latch.
[] The case should lock into the place when the latch is
released.
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