<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD><TITLE>RE: YS 63 question</TITLE>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.2900.2180" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><FONT face=Arial size=2><STRONG>Chuck:</STRONG></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I have three .63s with one being the latest version
with the regulator on the </FONT></DIV>
<DIV><FONT face=Arial size=2>push rods. It seems that the latest version would
be the least likely to "cook" the </FONT></DIV>
<DIV><FONT face=Arial size=2>regulator diaphragm given that it is mounted on the
pushrods versus the bottom</FONT></DIV>
<DIV><FONT face=Arial size=2>front of the crankcase as in the older
versions.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>If you are "punching" the throttle hard and the
engine backfires it is too</FONT></DIV>
<DIV><FONT face=Arial size=2>lean through the mid-range (which is definitely
affected by the regulator) or</FONT></DIV>
<DIV><FONT face=Arial size=2>the main needle is too lean.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Were you leaning the main needle to get the
idle to work properly and then it backfires?</FONT></DIV>
<DIV><FONT face=Arial size=2>If so, the suggestion in previous responses
may be correct about leaning out the idle</FONT></DIV>
<DIV><FONT face=Arial size=2>circuit by opening the idle air bleed
screw.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>If not, you should richen the regulator
(counter clockwise) and see if it helps.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Terry</FONT></DIV>
<BLOCKQUOTE
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=CCzarnik@arclp.com href="mailto:CCzarnik@arclp.com">Chuck Czarnik</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> Wednesday, September 08, 2004 8:58
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> RE: YS 63 question</DIV>
<DIV><BR></DIV><!-- Converted from text/plain format -->
<P><FONT size=2> CP 30 heli blend, fuel system was holding pressure, but
didn't really pump up like the engines I run. Fuel was fine, he is an
active heli flyer and runs the same jug in his helis. <BR><BR>First
flight ran fine without touching the regulators. These are the newest
63's with the regulator on the pushrods. Screw looked to be about 1 turn
in from flush (factory settings) Symptoms started after pulling the
plane out of storage for a couple of months. For that first flight,
engines were completely cowled with no cooling whatsoever other than valve
head sticking out of cowl. Not much smoke unless you ran the engines
very very rich when he had out on Mon.<BR><BR>I think heat damaged something,
maybe overheated the regulators after that first flight and cooked the
silicone? Whatever happened got both engines, they have the exact same
symptoms. Separate fuel systems, btw. I asked him about after run
oil, couldn't get a good answer there, but I don't think he used any. (good
news for the silicone).<BR><BR>-----Original Message-----<BR>From:
discussion-request@nsrca.org<BR>To: discussion@nsrca.org<BR>Sent: 9/8/04 7:43
PM<BR>Subject: Re: YS 63 question<BR><BR>Chuck:<BR><BR>Sounds like the
regulators are set lean or not working correctly. <BR><BR>What fuel is he
using? Are you sure that it is good?<BR><BR>Are you sure that the fuel system
is holding pressure?<BR><BR>How much time on the
engines?<BR><BR>Terry<BR><BR><BR>----- Original Message -----<BR>From: Chuck
Czarnik <<A
href="mailto:CCzarnik@arclp.com">mailto:CCzarnik@arclp.com</A>> <BR>To:
discussion@nsrca.org <<A
href="mailto:discussion@nsrca.org">mailto:discussion@nsrca.org</A>> <BR>Sent:
Wednesday, September 08, 2004 8:06 PM<BR>Subject: YS 63
question<BR><BR><BR>Quiet in here..<BR><BR>Tried to help a friend out at the
field on Mon with a pair of YS63's on<BR>a twin. Flew fine on the first
flight several months ago, but both of<BR>them now will not hold idle when he
pulled the plane back out this week.<BR>They mostly run at 3000 up, just
abruptly die below that.. Like fuel<BR>starvation. If you punch the
throttle hard, the engines would usually<BR>backfire and immediately die
unless you ran quite rich. Looks like he<BR>may have had a cooling issue
on both engines (no cowl air other than<BR>valve cover). Both engines
doing exact same thing. Possible heat<BR>damage?
Something ate both regulators? I ran out of ideas.<BR><BR>Not a pattern
plane, but there is a lot of YS knowledge on this list..<BR>Any
thoughts?<BR>TIA,
Chuck<BR><BR><BR>-----------------------------<BR><BR>NOTICE: The
information contained in this electronic mail message<BR><BR><BR><BR>is either
attorney privileged and/or confidential information intended<BR><BR>only for
the use of the individual or agent responsible to deliver<BR><BR>it to the
intended recipient; or, alternately, proprietary information<BR><BR>(trade
secret). You are hereby notified that any
dissemination,<BR><BR><BR><BR>distribution or copying of this communication or
unauthorized use of the<BR><BR><BR><BR>information herein contained, is
strictly prohibited. If you have<BR><BR><BR><BR>received this communication in
error, please immediately delete it<BR><BR><BR><BR>from your computer and
notify the sender of your receipt of
this<BR>message.<BR><BR><BR><BR><BR><BR></FONT></P>
<TABLE>
<TBODY>
<TR>
<TD bgColor=#ffffff><FONT color=#000000><PRE>-----------------------------
NOTICE: The information contained in this electronic mail message
is either attorney privileged and/or confidential information intended
only for the use of the individual or agent responsible to deliver
it to the intended recipient; or, alternately, proprietary information
(trade secret). You are hereby notified that any dissemination,
distribution or copying of this communication or unauthorized use of the
information herein contained, is strictly prohibited. If you have
received this communication in error, please immediately delete it
from your computer and notify the sender of your receipt of this message.
</PRE></FONT></TD></TR></TBODY></TABLE></BLOCKQUOTE></BODY></HTML>