Originally Posted by
ArchaicArcane
Try the test that the TFSR.org docs show.
I'd never have thought of removing a fixed horizontal bobbin case, attaching a weight then dropping it. Ingenious, but Is this method really in any 328K manual? I'd be surprised. Just pulling the thread and stoppping when there's a little tension works for me.
I've had the tension spring deformation thing happen too, on a 99K.