I used my weed eater and it was running rough.  Before I went to start it again I adjusted the valves as I normally do on occasion.  I went to crank it and the start assist wasn't working.  It would pull straight through like there wasn't any compression.  I checked everything that I had done and all was or appeared to be okay.  Any thoughts?  I checked all the springs I think on the cranking action and all seemed to work ok.  Thanks in advance.