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<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=070493204-09062005>Ken,</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=070493204-09062005> 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.</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN class=070493204-09062005>
<P><FONT size=2>John Pavlick<BR><A href="http://www.idseng.com/"
target=_blank>http://www.idseng.com</A><BR> </FONT>
</P></SPAN></FONT></DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">
<DIV align=left class=OutlookMessageHeader dir=ltr><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> discussion-request@nsrca.org
[mailto:discussion-request@nsrca.org]<B>On Behalf Of </B>Ken
Thompson<BR><B>Sent:</B> Wednesday, June 08, 2005 9:05 PM<BR><B>To:</B>
discussion@nsrca.org<BR><B>Subject:</B> YS valve not the only
problem<BR><BR></DIV></FONT>
<DIV><FONT face=Arial size=2>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.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I guess I'm not meant to fly this plane.
Does anybody know where I can get a good YS-91, cheap?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I think this one is going back to
YS.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Ken</FONT></DIV></BLOCKQUOTE></BODY></HTML>