If you are asking what was found as a cause that is still the not so great unknown. Still doing it (sticking that is) but I have not yet rebuilt the SCV.that is last resort.
I did that to mine, referred to in post#8, and it had no effect. ... Does the lever conventionally drive the spool directly? And is the spool a single piece - no swivel in the middle?
The only explanation I could think of when turning it had no effect was that I wasnt really turning the valving part. :confused3: