<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML xmlns:v xmlns:o><HEAD>
<META http-equiv=Content-Type content=text/html;charset=iso-8859-1>
<META content="MSHTML 6.00.2726.2500" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY id=MailContainerBody
style="PADDING-LEFT: 10px; FONT-WEIGHT: normal; FONT-SIZE: 10pt; COLOR: #000000; BORDER-TOP-STYLE: none; PADDING-TOP: 15px; FONT-STYLE: normal; FONT-FAMILY: Verdana; BORDER-RIGHT-STYLE: none; BORDER-LEFT-STYLE: none; TEXT-DECORATION: none; BORDER-BOTTOM-STYLE: none"
leftMargin=0 topMargin=0 acc_role="text" CanvasTabStop="true"
name="Compose message area"><?xml:namespace prefix="v" /><?xml:namespace prefix="o" />
<DIV>Never got a reply on the e-mail below, but I think I found an interesting
problem. This may also apply to some of the other YS problems with leaking fuel
through the carb. I believe the part is either the same or
similar.</DIV>
<DIV> </DIV>
<DIV>I pulled the regulator body apart and didn't find any debris. It was very
clean. After taking each piece apart and carefully inspecting for
any defects, I noted that the silicon seal that the plunger fits into, and
the spring fits on, may have caused the leak. Not due to damage or wear, but
poor quality control of the molding operation.</DIV>
<DIV> </DIV>
<DIV>Around the outer edge, you can see thick flashing. When I set this in the
regulator body and looked very close when applying force to the spring, there is
an interference that would prevent proper sealing of the seat. The interference
is the flashing hitting the regulator body and preventing the proper seal in the
hole to the plunger.</DIV>
<DIV> </DIV>
<DIV>I trimmed the flashing off and put it back together. Engine is better than
ever and no more leaking.</DIV>
<DIV> </DIV>
<DIV>This makes sense as a brand new part could seal when new. After a few
flights and getting broke in, then the flashing prevents a good seal. The
only way to recover this would to increase the spring tension by screwing in the
adjustment screw to apply more force on the spring for the seal.</DIV>
<DIV> </DIV>
<DIV>Has anybody else seen this problem?</DIV>
<DIV> </DIV>
<DIV>Engine is working fine now, so I guess I have to make my first contest
in Dayton, OH this weekend. After practicing in a cross wind, I think I'm
going to get my own hard hat just in case…<VBG> Should be at the field
around 5pm. I will need much help in trimming the plane. Didn't get allot of
flying time with the weather in southern Indiana… If anyone is going to stay at
a Holiday Inn let me know. I think I can get a military discount for any rooms I
pay for (you would have to give me the money though ;^) Military rates are often
the best rates Holiday Inn offers.</DIV>
<DIV> </DIV>
<DIV>See ya,</DIV>
<DIV> </DIV>
<DIV>Larry<BR></DIV>
<BLOCKQUOTE dir=ltr
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="FONT: 10pt arial"><B>From:</B> <A title=jed241@msn.com
href="mailto:jed241@msn.com">jed241@msn.com</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">NSRCA</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, May 26, 2003 5:12 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Need help with YS 63</DIV>
<DIV><BR></DIV>
<DIV
style="FONT-WEIGHT: normal; FONT-SIZE: 10pt; COLOR: #000000; FONT-FAMILY: Verdana">
<DIV>The engine started leaking fuel through the carb just dripping out and
floods. It just started doing this. Tank pressure is good. I only have about
10 flights on this engine and today is the first time it refused to
start.</DIV>
<DIV> </DIV>
<DIV>I checked the diaphram in the regulator and it is in good shape.</DIV>
<DIV> </DIV>
<DIV>Thanks for your help….</DIV>
<DIV> </DIV>
<DIV>Larry<BR></DIV></DIV></BLOCKQUOTE></BODY></HTML>