YS valve not the only problem

[Ken Thompson]

Thanks John,
With the crank moving like it is, I'm going to replace the bearings and then re-set the valve clearance on re-assembly,

Ken
  ----- Original Message ----- 
  From: John Ferrell 
  To: discussion at nsrca.org 
  Sent: Wednesday, June 08, 2005 9:49 PM
  Subject: Re: YS valve not the only problem


  Verify the valves are still in adjustment. When they seat, they will eed a readjust...

  John Ferrell    
  http://DixieNC.US

    ----- Original Message ----- 
    From: Ken Thompson 
    To: discussion at nsrca.org 
    Sent: Wednesday, June 08, 2005 9:05 PM
    Subject: YS valve not the only problem


    I just fired my YS-91 up after the valve cleaning.  It fired immediately and had plenty of power while still running rich.  After running for a minute or two the rpm's started fluctuating a bit.  The more it ran the less rpm's I was able to maintain.  I heard a noticable rattle that seemed to be coming from the engine area.  After the engine ran for about 5 minutes, the rpm's started to drop more.  I leaned the needle a little and the revs didn't increase, so I richened it back up and idled down, the motor died.  I felt the spinner to see if it was warm and it wasn't, that's when I noticed the movement of the output shaft.  My first thought is the front bearing, I have quite a bit of movement up and down and a little side to side.

    I guess I'm not meant to fly this plane.  Does anybody know where I can get a good YS-91, cheap?

    I think this one is going back to YS.

    Ken
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