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No prime through petcock

  • Thread starter Thread starter mac250
  • Start date Start date
M

mac250

Guest
ive done a lot of searching. Both this site and Google.
Mi have found a few topics that touch base, but none answered the question. Or helped. And the closest one had pictures that were old and "not found"


so my 1981 gs850gl, rebuilding the petcock. I had no issues rebuilding it, and thought it was together properly. But now I have no prime.
Reserve and on both work. But the prime won't flow.
Through my searches I've found different placement of the smaller of the two springs which caused me to second guess where I placed it.
So the big questions are
I have two springs. One wide and weak. And the other thin. But very stiff.
The wide goes on the diaphragm. And the thin one goes where?

i also have a metal flat spring. That is probably bent out of shape. Where. And how does it go?
somehow something needs to push the diaphragm piston back when the selector is in prime. I can't figure out what and how though?

thanks
 
That "bent" spring is what goes into the cavity before the selector barrel. There is a ramp on the back end of that barrel that pushes the prong on the end of the 'bent' spring to open the valve for PRIme.

.
 
Thank you. I have figured out that far now. After a few hours of tinkering. Everything has foundits place.

Many problem now is that the prong that pushes the piston open, keeps riding the lip of the tapered piece.
Mo can get it to seat Intho e center of the tapered piece once. Then wheni turn it to prime and the spring rides up the ramp, it catches the top of the plastic and stays in pressing on the piston through all three settings, until I tear it apart and reset it again.
 
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