<html><div style='background-color:'><P>Ed - </P>
<P>two thoughts on bearings - </P>
<P>1. I've heard from others that a worn front bearing can be the cause of idle problems - has that one been changed lately? </P>
<P>2. rear bearings - I've not had real success w/ any bearing other than an OS EFI bearing installed just as it comes out of the bag - don't know how long they last because both engines are on their second or third season on the same rear bearing... Stock bearing, aftermarket stainless, Boca's of various flavors all had finite - and short- lives in my engines ... </P>
<P>It'll be great to see you on the flight line in Muncie! </P>
<P>Rick <BR><BR></P>
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From: <I>"Ed Miller" <edbon85@charter.net></I><BR>Reply-To: <I>NSRCA Mailing List <nsrca-discussion@lists.nsrca.org></I><BR>To: <I>"NSRCA Mailing List" <nsrca-discussion@lists.nsrca.org></I><BR>Subject: <I>Re: [NSRCA-discussion] OS 140RX rough and inconsistent idle</I><BR>Date: <I>Mon, 26 Jun 2006 13:56:41 -0400</I><BR><BR>
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<DIV>Thanks, looked at that so far when I removed engine, all looks normal. Taking the engine apart in an hour or so. </DIV>
<DIV>Yes, I'll be getting fuel from Scott Thursday. I figured this was better than cramping you guys on the trip out to Muncie. I'll call you tonight. </DIV>
<DIV>Ed.</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=DaveL322@comcast.net href="mailto:DaveL322@comcast.net">DaveL322@comcast.net</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=nsrca-discussion@lists.nsrca.org href="mailto:nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, June 26, 2006 1:39 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] OS 140RX rough and inconsistent idle</DIV>
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<DIV>Ed,</DIV>
<DIV> </DIV>
<DIV>Long shot - but double check throttle servo mount/linkage, and mounting of engine, softmount, nosering, pipe, etc - any of that stuff gets loose, funny things can happen.</DIV>
<DIV> </DIV>
<DIV>Anderson should have fuel for you.</DIV>
<DIV> </DIV>
<DIV>Dave</DIV>
<DIV> </DIV>
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">-------------- Original message -------------- <BR>From: "Ed Miller" <<A href="mailto:edbon85@charter.net">edbon85@charter.net</A>> <BR><BR>> Have an OS 140RX that has developed a rough and inconsistent idle. Engine <BR>> runs perfectly except for idle. It has a Mintor head with either an OS F or <BR>> K&B 1L in center plug and an OS A5 in the angled plug position, a Perf Spec <BR>> AAC piston/liner assembly and a Boca sealed SS rear bearing. I have the head <BR>> mounted with angled plug towards the front or carb side of engine. Fuel is <BR>> S&W 20 nitro, 16 synthetic and 2 castor. Engine has 7 gallons of fuel run <BR>> through it. Prop is an APC 15.75 x 11 3 blade by Dave Lockhart. The lowest <BR>> I can get the idle before it quits is 1900 ~ 2000 rpm and it is
rough, <BR>> sounds like it is firing every other revolution. Idle mixture screw is <BR>> working, I can richen idle to poi! nt wher e engine will barely transition from <BR>> being rich and I can lean mixture so the transition is fine but engine slows <BR>> at idle like it is too rich. While it is slowing with either the idle <BR>> mixture screw lean or rich, engine is rough, again like it often fires every <BR>> other revolution at times. I used to be able to reliably idle this engine at <BR>> 1300 rpm. I have a second OS 140RX set up exactly the same except it doesn't <BR>> have the AAC piston/liner and it runs/idles perfectly. Tried cleaning the <BR>> carb/spray bar with no change. I once had a Super Tiger that exhibited <BR>> similar characteristics due to a worn out con rod. Is it possible the con <BR>> rod on this OS could cause this issue ?? Any
suggestions will be greatly <BR>> appreciated. <BR>> Ed M. <BR>> _______________________________________________ <BR>> NSRCA-discussion mailing list <BR>> NSRCA-discussion@lists.nsrca.org <BR>> http://lists.nsrc! a.org/m ailman/listinfo/nsrca-discussion </BLOCKQUOTE>
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