Just to affirm "the problem could be anywhere" idea - yesterday, I was working on a 301 I've had for a while, but not not messed with. it still had the fabric under the needle that was there when I bought the machine. I didn't test it out, as I bought it with the understanding it had a problem (at a greatly reduced price).
I was checking it out and oiling the oiling spots (and trying to remember where I put the cord and controller) and it was really hard to turn the hand wheel. At first, I thought something was wrong with the machine, then it occurred to me that needle was probably dull. It took a minute to realize that it was the fabric under the needle that was the problem. I removed the fabric and it turned over just fine. It was really stiff fabric that looked like standard quilting fabric.
The moral of the story is "keep looking".
bkay
Last edited by bkay; 09-02-2020 at 04:28 AM.
Reason: left out a thought