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<DIV>John,</DIV>
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<DIV>I have the same problem in my old 140 Rx. Decided to replace piston, ring and connecting rod. As soon as I replace the parts I will really know if that is the solution. My engine is very old so it makes sense to me. The question is: how much your engine was used in the past? </DIV>
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<DIV>I will let you know but is going to take me some time. I will run the engine on the bench as soon as I replace the parts.</DIV>
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<DIV>Vicente "Vince" Bortone </DIV>
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<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">-------------- Original message -------------- <BR>From: "John Pavlick" <jpavlick@idseng.com> <BR><BR>> Sorry - Aeroslave pipe, APC 15.75x10 3-blade (re-pitched by Dave L.). Fuel <BR>> is morgan Omega 15%. The pipe is currently set at 31 3/4" straight-line from <BR>> plug center to the end of the pipe with an OS O-ring header. I know this <BR>> measurement only makes sense if using the same header or at least one with <BR>> the same total length. <BR>> <BR>> John Pavlick <BR>> http://www.idseng.com <BR>> <BR>> <BR>> > -----Original Message----- <BR>> > From: nsrca-discussion-bounces@lists.nsrca.org <BR>> > [mailto:nsrca-discussion-bounces@lists.nsrca.org]On Behalf Of <BR>> > Wayne Galligan <BR>> > Sent: Sunday, September 24, 2006 8:31 PM <BR>> > To: NSRCA Mailing List <BR>> > Subject: Re: [NSRCA-discussion] OS 140Rx pu
mp question <BR>> > <BR>> > <BR>> > John, <BR>> > <BR>> > What pipe? What fuel? What prop are you using? <BR>> > Lengthen your pipe till the midrange richness goes away. My OS <BR>> > will do the <BR>> > same thing. The needle on mine is about 3/4 turn out also . I would not <BR>> > mess with the pump till you have tried lengthening the pipe. This almost <BR>> > always fixes that problem. Less load(smaller prop) on the engine shorten <BR>> > pipe, more load(larger prop)lengthen the pipe. <BR>> > <BR>> > Wayne Galligan <BR>> > ----- Original Message ----- <BR>> > From: "John Pavlick" <JPAVLICK@IDSENG.COM><BR>> > To: "NSRCA Discussion" <NSRCA-DISCUSSION@LISTS.NSRCA.ORG><BR>> > Sent: Sunday, September 24, 2006 12:29 AM <BR>> > Subject: [NSRCA-discussion] OS 140Rx pump question <BR>> > <BR>> > <BR>> > > I'm having some trouble with my OS 140Rx and it seems to
me that maybe <BR>> > > somebody played with the pump (I bought this motor used). Here's what's <BR>> > > going on. The main needle wants to be at about 3/4 turns out. Not even a <BR>> > > full turn. If I open it to 1 1/4 turns it's slobbering rich. The idle is <BR>> > > rich even with the adjustment turned fully clockwise. It is <BR>> > flyable, but I <BR>> > > know something isn't right. This motor also has a dual-plug OS head. I <BR>> > have <BR>> > > an "F" plug in the center and an "8" in the rear. The transition isn't <BR>> > > great, especially at about 1/2 throttle. On the ground it will actually <BR>> > load <BR>> > > up sometimes. In the air it's not so bad but it doesn't sound <BR>> > right. If it <BR>> > > had a Perry pump I'd back off the pressure and that would <BR>> > probably fix it. <BR>> > > Like I said, I'm thinking someone played with the pump
for whatever <BR>> > reason. <BR>> > > Is there any way to set it up as it was originally or do I have <BR>> > to send it <BR>> > > back to the service center? <BR>> > > <BR>> > > John Pavlick <BR>> > > http://www.idseng.com <BR>> > > <BR>> > > -- <BR>> > > No virus found in this outgoing message. <BR>> > > Checked by AVG Free Edition. <BR>> > > Version: 7.1.405 / Virus Database: 268.12.8/455 - Release Date: 9/22/06 <BR>> > > <BR>> > > _______________________________________________ <BR>> > > NSRCA-discussion mailing list <BR>> > > NSRCA-discussion@lists.nsrca.org <BR>> > > http://lists.nsrca.org/mailman/listinfo/nsrca-discussion <BR>> > > <BR>> > <BR>> > _______________________________________________ <BR>> > NSRCA-discussion mailing list <BR>> > NSRCA-discussion@lists.nsrca.org <BR>> > http://lis
ts.nsrca.org/mailman/listinfo/nsrca-discussion <BR>> > -- <BR>> > No virus found in this incoming message. <BR>> > Checked by AVG Free Edition. <BR>> > Version: 7.1.405 / Virus Database: 268.12.8/455 - Release Date: 9/22/06 <BR>> > <BR>> -- <BR>> No virus found in this outgoing message. <BR>> Checked by AVG Free Edition. <BR>> Version: 7.1.405 / Virus Database: 268.12.8/455 - Release Date: 9/22/06 <BR>> <BR>> _______________________________________________ <BR>> NSRCA-discussion mailing list <BR>> NSRCA-discussion@lists.nsrca.org <BR>> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion </BLOCKQUOTE></body></html>