YS valve not the only problem

[Eddie Batchelor]

Ken
I have a YS91AC I bought used and flew in my Explorer a dozen or so times
before moving up to a YS110. It's been sitting on my bench for over a year
now. I'll sell it for $125.00 shipped.


Eddie
email : perkinsrx at centurytel.net
  -----Original Message-----
  From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On
Behalf Of Ken Thompson
  Sent: Thursday, June 09, 2005 5:04 AM
  To: discussion at nsrca.org
  Subject: Re: YS valve not the only problem


  John,
  Everything checks out except the crank movement.  The new bearings are
being ordered today and I'm going to see Verne when I get them.
  All should be well shortly.
  I am still in the market for a good YS-91AC if you know of anybody.

  Ken
    ----- Original Message -----
    From: John Pavlick
    To: discussion at nsrca.org
    Sent: Thursday, June 09, 2005 12:41 AM
    Subject: RE: YS valve not the only problem


    Ken,
     Does it start Ok after it cools off? Make sure you set the valve lash
correctly. You shouldn't have a lot of movement in the crank. That's another
problem. At this point it is probably worth sending it in for service. Most
of the guys I know that are flying YS have a backup motor - probably would
be a good idea to find a second one. That way you can get the plane in the
air while your motor is out for service. Before you send it in though, check
the compression and the valve lash. You might find something there.
    John Pavlick
    http://www.idseng.com


      -----Original Message-----
      From: discussion-request at nsrca.org
[mailto:discussion-request at nsrca.org]On Behalf Of Ken Thompson
      Sent: Wednesday, June 08, 2005 9:05 PM
      To: discussion at nsrca.org
      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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