yea, to me it sounds like you don't have any compression... I don't see what the clutch would do with the engine stalling, this doesn't sound like the symptoms of a bad clutch to me...

when an engine loses compression, it won't idle any longer.

and like jonnyd said, don't run it at that low of a temp, I used to run mine as rich as I could, while it would still run... mine almost made it to gallon #3 before it died, I can now take my piston and push it in the sleeve, and out the other side... running too rich can cause premature-wear