X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 18 Dec 2008 16:43:37 -0500 Message-ID: X-Original-Return-Path: Received: from vms173007pub.verizon.net ([206.46.173.7] verified) by logan.com (CommuniGate Pro SMTP 5.2.10) with ESMTP id 3370493 for lml@lancaironline.net; Wed, 17 Dec 2008 17:17:41 -0500 Received-SPF: pass receiver=logan.com; client-ip=206.46.173.7; envelope-from=tom.gourley@verizon.net Received: from jacky0da39824a ([70.193.109.229]) by vms173007.mailsrvcs.net (Sun Java System Messaging Server 6.2-6.01 (built Apr 3 2006)) with ESMTPA id <0KC1005X7KHX2CD0@vms173007.mailsrvcs.net> for lml@lancaironline.net; Wed, 17 Dec 2008 16:15:47 -0600 (CST) X-Original-Date: Wed, 17 Dec 2008 14:16:40 -0800 From: "Tom Gourley" Subject: Re: [LML] runaway starter X-Original-To: "Lancair Mailing List" Reply-to: "Tom Gourley" X-Original-Message-id: <000701c96095$247571c0$e56dc146@jacky0da39824a> MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.3350 X-Mailer: Microsoft Outlook Express 6.00.2900.3138 Content-type: multipart/alternative; boundary="----=_NextPart_000_0004_01C96052.14CFFE90" X-Priority: 3 X-MSMail-priority: Normal References: This is a multi-part message in MIME format. ------=_NextPart_000_0004_01C96052.14CFFE90 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable If it's truly a mechanical hang and the starter solenoid really is open = then the starter shouldn't be able to drive current back onto the main = electrical bus. However, if you have diodes or transient voltage = suppressors on the starter solenoid, depending on how they're configured = they may provide a path for current, depending on how much voltage the = starter generates. It may just burn out the diode or TVS, which could = generate some smoke. In any event a mechanical hang isn't good for the = starter. Tom Gourley ------=_NextPart_000_0004_01C96052.14CFFE90 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
If it's truly a mechanical hang and the = starter=20 solenoid really is open then the starter shouldn't be able to drive = current back=20 onto the main electrical bus.  However, if you have diodes or = transient=20 voltage suppressors on the starter solenoid, depending on how they're = configured=20 they may provide a path for current, depending on how much voltage the = starter=20 generates.  It may just burn out the diode or TVS, which could = generate some smoke.  In any event a mechanical hang isn't good for = the=20 starter.
 
Tom Gourley
 
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