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<DIV>Anthony,</DIV>
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<DIV>What brand and type bearings are you using? I was using a brand that does not have ss shields. I had similar problem and decided to use Boca Bearings that has ss shields. The think that fixed my problem. I suspect that the plastic material started to breakdown with the nitro and high temperature (after many runs. probably more than 150 flights) and was contaminating the glow plugs. </DIV>
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<DIV>Vince </DIV>
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<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">-------------- Original message -------------- <BR>From: "Anthony Romano" <anthonyr105@hotmail.com> <BR><BR>> Having some trouble with my RX having an erratic idle and an appetite for <BR>> glow plugs before the Nats. Replace both bearings that seemed perfect, as <BR>> was the rest of the internals, and cleaned some carbon of the piston before <BR>> the Nats. Idled and ran better but was a little tight on the next run. This <BR>> seemed to improve quickly as the bearing seals seated but down on power. <BR>> Got to Muncie and was a bit down on power. After ingesting another plug from <BR>> over twisting the needles I was given a remedial needle valve lesson by Ron <BR>> Lockhart and switched to 30% Nitro. Made it through the Nats without much <BR>> power. <BR>> Today went to back to 20% for the lower heat and made sure I had the needle <BR>> set 7600 rpm lau
nch from a 7800 rpm peak on a pinch. When taxiing it loaded <BR>> up and quit and wouldn't restart. Another new plug and double check the <BR>> needle and made a weak flight. Second flight same thing but this time got it <BR>> restarted without replacing the plug. <BR>> Now here is the interesting part. This engine has always had a lot of fuel <BR>> gooped on the head and header. Today noticed a lot on the bottom of the <BR>> plane. I am thinking either a bad ring or some damage to the crank port or <BR>> the case. Any other ideas? <BR>> <BR>> OS 1.40 RX <BR>> SS bearings <BR>> Aeroslave pipe 25.25 from baffle to plug <BR>> 15.75*10*3 APC <BR>> 20% S&W fuel <BR>> OS type F <BR>> <BR>> Can't afford to change to other power source so any ideas on this one would <BR>> be helpful. <BR>> <BR>> TIA <BR>> <BR>> Anthony <BR>> <BR>> <BR>> _______________________________________________ <BR>> NSRCA-discussion mail
ing list <BR>> NSRCA-discussion@lists.nsrca.org <BR>> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion </BLOCKQUOTE></body></html>