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<DIV><FONT face=Arial size=2>OK Bob,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>All of the parts, except for the gasket of course,
are soaking in fuel. Tomorrow I will re assemble the parts.
Everything looked OK including the small silicone part of the plunger. I
know that it has to seal the hole in the center of the regulator body and I
couldn't see any irregularities which would prevent that. ( I'm
beginning to think it really was a new engine). I am going to order a
couple of diaphragms, plunger assemblies, springs, and at least one gasket
set. I have several YS 120s, and one of them I know has a home made gasket
for the regulator----I haven't tried to run that one yet. It also had a
drilled out exhaust port on the head which I didn't notice---ended up sending
the head to Clarence Lee and he put a brass adapter in the head so we are back
being able to use standard header threads again---live and learn.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Bruce</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=getterflash@yahoo.com href="mailto:getterflash@yahoo.com">Bob
Kane</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=nsrca-dist4@lists.nsrca.org
href="mailto:nsrca-dist4@lists.nsrca.org">IN, KY, MI, OH, WV</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, May 25, 2009 6:44 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-dist4] YS-120NC vs.
me</DIV>
<DIV><BR></DIV>
<DIV
style="FONT-SIZE: 12pt; FONT-FAMILY: times new roman,new york,times,serif">From
what you describe the regulator is no longer regulating. The regulator has 8
parts, the gasket, regulator body, regulator screw, o-ring seal for the
regulator screw, the spring, the regulator plunger (looks like a small poppet
valve, made of brass) and two other key parts, the diaphragm and the plunger
"tip", both made of silicone. The spring is probably OK, but I'll bet the
diaphragm and the regulator "tip" need replacing. I think you have to buy
plunger and tip together, the diaphragm you can buy by itself. They are not
difficult to rebuild, just pay attention to which side of the gasket the
diaphragm goes on.<BR>
<DIV> </DIV>Bob Kane<BR>getterflash@yahoo.com
<DIV><BR></DIV>
<DIV
style="FONT-SIZE: 12pt; FONT-FAMILY: times new roman,new york,times,serif"><BR>
<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: times
new roman,new york,times,serif"><FONT face=Tahoma size=2>
<HR SIZE=1>
<B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B> bruce & sandy
<bruceher@bright.net><BR><B><SPAN
style="FONT-WEIGHT: bold">To:</SPAN></B> nsrca d4 list
<nsrca-dist4@lists.nsrca.org><BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></B> Monday, May 25, 2009 7:08:00
AM<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> [NSRCA-dist4]
YS-120NC vs. me<BR></FONT><BR>
<STYLE></STYLE>
<DIV><FONT face=Arial size=2>Hi Guys,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Need a little help/advice here. Trying to
get this YS-120NC running that I bought several years ago. I think it
was supposed to be new, but you know how that goes. I think it's a
regulator problem, but I have almost no experience with regulators. I'm
sure you realize how rare someone with YS engine experience is in and around
Quincy, Ohio!!</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>First attempts--High speed needle about 2 turns
out. Regulator adjusting screw even with top of regulator housing.
Finally got a real rough idle (think I turned regulator adjusting screw in
slightly). Advancing throttle killed it right away, indicating a real
rich idle. I was tired and put plane in barn. While I was away all
of the unused fuel syphoned out of the tank on to the floor (no
biggie, remember it is a barn!). Hard to tell where it leaked out
(inverted engine) imagine it came out the carb intake, but it certainly
came through the regulator.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>In desperatiion, yesterday I screwed the
regulator adjusting screw all the way in until it seated. Don't think I
backed it off at all. Engine started with a kind of rough idle.
Transition to full throttle (needle 2 turns out) was good. I didn't play
anymore. Imagine if I back off the adjusting screw to get a smooth idle,
the unused fuel will again syphon out of the tank.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>So, you YS wizards, what do I do? If
I should replace the diaphram in the regulator, do I replace the spring
too? Guess replacing the gasket is a given.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Sorry about this, but I don't have anybody to
talk to.</FONT></DIV>
<DIV><FONT face=Arial size=2></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>Bruce</FONT></DIV></DIV></DIV></DIV><BR>
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