YS valve not the only problem

[Verne Koester]

Ken,
If the crank is moving, it's bearings. Most likely the rear. I'd replace both since it's going to be apart anyway. I'd be happy to help you out with all this, but you'll need to get the bearings first.

Verne


  ----- 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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