<DIV> I've read that Marvels Mystery Compressor oil is the thing to use. Any thoughts? By the way I saw quite a few problems with the pushrods and the pump cams on the DZ's this last season. The pre lube thing sounds smart. Mike<BR><BR><B><I>Dean Pappas <d.pappas@kodeos.com></I></B> wrote:
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<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>
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<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>
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<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>
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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=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>
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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=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></BLOCKQUOTE></DIV><p><hr SIZE=1>
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