<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.2800.1276" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><SPAN class=215144415-18112003><FONT face=Arial color=#0000ff size=2>I
agree with Eric ...</FONT></SPAN></DIV>
<DIV><SPAN class=215144415-18112003><FONT face=Arial color=#0000ff size=2>I have
seen more wiped cam followers and abused cams than you can shake a stick
at, and I believe that most of it happened in the first minute of running a new
engine. Once the surface galls, it wears differently for many hours of running.
A good pre-lube in a new engine is an excellent idea, especially with the DZ not
having raw fuel in the crankcase. The same oil as used in your fuel would also
be good. Don't try any automotive cam pre-lube: it usually has moly-disulfide
and will mess up glo-plugs and running until it washes out of the enginne. Don't
ask how I know!</FONT></SPAN></DIV>
<DIV><SPAN class=215144415-18112003><FONT face=Arial color=#0000ff
size=2>Regards All,</FONT></SPAN></DIV>
<DIV><SPAN class=215144415-18112003><FONT face=Arial color=#0000ff
size=2>Dean</FONT></SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> Henderson,Eric
[mailto:Eric.Henderson@gartner.com]<BR><B>Sent:</B> Tuesday, November 18, 2003
10:29 AM<BR><B>To:</B> discussion@nsrca.org<BR><B>Subject:</B> RE: After run
Oil<BR><BR></FONT></DIV>
<DIV><SPAN class=760471115-18112003><FONT face=Arial color=#0000ff size=2>The
interesting thing about using Mobil -1 as an after-run oil is that it really
behaves like a before-run oil. - more on that later.</FONT></SPAN></DIV>
<DIV><SPAN class=760471115-18112003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=760471115-18112003><FONT face=Arial color=#0000ff size=2>One
thing that I noticed on YS's is that when we run them dry of combustible fuel
we forget that there is fuel still in the cup portion of the piston if we
are running inverted. It is a good idea to run the engine out with the engine
upright. If you run it dry inverted, it will always give you one more pop
if you try it again the right way up. </FONT></SPAN></DIV>
<DIV><SPAN class=760471115-18112003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=760471115-18112003><FONT face=Arial color=#0000ff size=2>The
best way to protect a YS is to treat before the first run. A tear-down
looking for ali-crud is always a good idea. Then just smear everything with
Mobil-1 on reassembly.</FONT></SPAN></DIV>
<DIV><SPAN class=760471115-18112003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=760471115-18112003><FONT face=Arial color=#0000ff size=2>(As
an aside my YS 1.10 spit a prop this weekend without warning. The culprit was
a chard of aluminum stuck in the silicone poppet valve in the regulator. This
caused fuel to leak to the carb. Tightening down the regulator stopped that
happening, but when the piece fully embedded itself it then had a good
seat-seal and caused a very lean feed to the carb. - Will check for that next
time)</FONT></SPAN></DIV>
<DIV><SPAN class=760471115-18112003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=760471115-18112003><FONT face=Arial color=#0000ff size=2>If
you use Mobil-1 you will find that it does not mix with the fuel. It will
cause a good smoke cloud and mess with the initial run of the engine.takes
about 60 seconds to burn it all out. I believe that during this burn-out that
is when it does the most good to the engine. Mobil-1 appears to get into
the "skin" of metal such as crankshafts and definitely has kept my
bearings in good shape.</FONT></SPAN></DIV>
<DIV><SPAN class=760471115-18112003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=760471115-18112003><FONT face=Arial color=#0000ff
size=2>Regards,</FONT></SPAN></DIV><SPAN class=760471115-18112003><FONT
face=Arial color=#0000ff size=2>
<DIV><BR>Eric.</DIV>
<DIV> </DIV>
<DIV></FONT></SPAN> </DIV>
<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>Bill
Thompson<BR><B>Sent:</B> Monday, November 17, 2003 7:48 PM<BR><B>To:</B>
discussion@nsrca.org<BR><B>Subject:</B> Re: After run Oil<BR><BR></FONT></DIV>
<DIV><FONT face=Arial size=2>Terry</FONT></DIV>
<DIV><FONT face=Arial size=2>What you just said is what I have been doing
since the late 80's. I asked the question because three or four people told me
that I am killing my engine's. I replaced my bearings after over 200
flights no rust and just like you said it was to make me feel better. I am
running 25% Cool Power synthetic. Thanks for your help.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Bill Thompson</FONT></DIV>
<DIV><FONT face=Arial size=2>AMA 7703</FONT> </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="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=tbrox@cox.net href="mailto:tbrox@cox.net">Terry Brox</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> Monday, November 17, 2003 6:27
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: After run Oil</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>Hi Bill,</FONT></DIV>
<DIV><FONT face=Arial size=2> You
will get a wide range of opinions on this. The main difference will be
whether or not to use any, and if not, whether or not to run the engine dry.
</FONT></DIV>
<DIV><FONT face=Arial
size=2> I never use after
run, however, performance specialties sell an after run that will not harm
the internals of the engine. DO NOT USE A PETROLEUM BASED PRODUCT OF ANY
KIND.</FONT></DIV>
<DIV><FONT face=Arial
size=2> I run Cool
Power heli fuel and run the engine dry after flying. I never have replaced
bearings because of need. I have replaced the bearings just to "make me feel
better" but they seemed fine. When I rebuild a YS, the inside is full of
oil, even though I run it dry after flying. When running it dry, only the
part of the fuel that burn will run out, leaving a good bit of oil still in
the engine.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial
size=2> Hope this
helps get the thread started, good luck, Terry</FONT></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="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=billt38122@comcast.net href="mailto:billt38122@comcast.net">Bill
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> Monday, November 17, 2003 4:06
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> After run Oil</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>What is the best after run oil should I use
in my YS engines ?</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Bill Thompson</FONT></DIV>
<DIV><FONT face=Arial size=2>AMA
7703</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>