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<DIV><FONT face=Arial size=2>Thanks for the info, John. I ordered the
bearings from Central and Verne offered to help me install them. Being
that this is my first attempt at bearing replacement in a small engine, I'm
going to take him up on his offer. One thing I've always believed, learn
all you can and never turn down help from the knowledgable, whether it be
mechanical or informational.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Ken</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=johnferrell@earthlink.net
href="mailto:johnferrell@earthlink.net">John Ferrell</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, June 09, 2005 9:27
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: YS valve not the only
problem</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>When you have a spare engine, you seldom need
it!</FONT></DIV>
<DIV><FONT face=Arial size=2>When you don't, it happens a lot!</FONT></DIV>
<DIV><FONT face=Arial size=2>Some variation of Murphy's law I
think.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I cannot recall ever seeing a failed front
bearing. They are cheap so I usually replace with the rear
anyway.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Inspect the case & crank for signs of the
bearing having turned & damaging the fit. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Just a reminder: The cam MUST come out before you
remove the crank! Mark the gears carefully. It takes above average patience to
find the correct timing the hard way. Few pattern flyer posses that much
patience.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV>John Ferrell <BR><A
href="http://DixieNC.US">http://DixieNC.US</A><BR></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=mrandmrst@comcast.net href="mailto:mrandmrst@comcast.net">Ken
Thompson</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, June 09, 2005 6:40
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: YS valve not the only
problem</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>I'll check them out, Bob.</FONT></DIV>
<DIV><FONT face=Arial size=2>Thanks,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Ken</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=rcaerobob@cox.net href="mailto:rcaerobob@cox.net">Bob
Pastorello</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, June 09, 2005 6:16
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: YS valve not the only
problem</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>Two on RCU right now, Ken.</FONT></DIV>
<DIV><BR>Bob Pastorello<BR><A
href="http://www.rcaerobats.net">www.rcaerobats.net</A><BR><A
href="mailto:rcaerobob@cox.net">rcaerobob@cox.net</A></DIV>
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style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=mrandmrst@comcast.net href="mailto:mrandmrst@comcast.net">Ken
Thompson</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, June 09, 2005 5:03
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: YS valve not the only
problem</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>John,</FONT></DIV>
<DIV><FONT face=Arial size=2>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.</FONT></DIV>
<DIV><FONT face=Arial size=2>All should be well shortly.
</FONT></DIV>
<DIV><FONT face=Arial size=2>I am still in the market for a good YS-91AC
if you know of anybody.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Ken</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=jpavlick@idseng.com href="mailto:jpavlick@idseng.com">John
Pavlick</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, June 09, 2005
12:41 AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> RE: YS valve not the
only problem</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=070493204-09062005>Ken,</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff 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 face=Arial color=#0000ff 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>
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<DIV class=OutlookMessageHeader dir=ltr align=left><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></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>