X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ms-smtp-04.southeast.rr.com ([24.25.9.103] verified) by logan.com (CommuniGate Pro SMTP 5.1.9) with ESMTP id 2092040 for flyrotary@lancaironline.net; Fri, 08 Jun 2007 16:08:17 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.103; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-103-061.carolina.res.rr.com [24.74.103.61]) by ms-smtp-04.southeast.rr.com (8.13.6/8.13.6) with SMTP id l58K7Njq023509 for ; Fri, 8 Jun 2007 16:07:23 -0400 (EDT) Message-ID: <000601c7aa09$2746afc0$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" Subject: Spark Plug Cleaning Date: Fri, 8 Jun 2007 16:11:08 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0003_01C7A9E7.9FCC14C0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3028 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0003_01C7A9E7.9FCC14C0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Getting around to see what can be done about the lead fouling sparkplugs = causing the infamous "SAG". 1st experiment was to place the used spark = plugs in a 30% solution of Hydrogen Peroxide. I did that and place the = plugs and solution in an ultrasonic cleaner, turned it on and left it on = for 1 hour. It appeared to clean everything off the plug - but, the lead. So far = the only chemical my research has indicated would dissolved metallic = lead is Nitric Acid. Nope, not going to try that, I'll stick with = buying new plugs. But, thought I would let folks know of the results. I was really hoping = the ultrasonic vibration would shake the lead crystals off the ceramic = cone of the plug - but either the idea is flawed or the small jewelry = cleaning size ultrasonic generator is simply not powerful enough. Ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://members.cox.net/rogersda/rotary/configs.htm#N494BW http://www.dmack.net/mazda/index.html ------=_NextPart_000_0003_01C7A9E7.9FCC14C0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Getting around to see what can be done about the = lead=20 fouling sparkplugs causing the infamous "SAG". 1st = experiment was to=20 place the used spark plugs in a 30% solution of Hydrogen Peroxide. = I did=20 that and place the plugs and solution in an ultrasonic cleaner, turned = it on and=20 left it on for 1 hour.

It appeared to clean everything off the plug - = but, the=20 lead. So far the only chemical my research has indicated would = dissolved=20 metallic lead is Nitric Acid. Nope, not going to try that, I'll = stick with=20 buying new plugs.

But, thought I would let folks know of the = results. =20 I was really hoping the ultrasonic vibration would shake the lead = crystals off=20 the ceramic cone of the plug - but either the idea is flawed or the = small=20 jewelry cleaning size ultrasonic generator is simply not powerful=20 enough.

Ed Anderson
Rv-6A N494BW Rotary = Powered
Matthews,=20 NC
eanderson@carolina.rr.comhttp:/= /members.cox.net/rogersda/rotary/configs.htm#N494BW
http://www.dmack.net/mazda= /index.html

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