X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 10 [X] Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 14 May 2007 09:29:26 -0400 Message-ID: X-Original-Return-Path: Received: from web62502.mail.re1.yahoo.com ([69.147.75.94] verified) by logan.com (CommuniGate Pro SMTP 5.1.8) with SMTP id 2043290 for lml@lancaironline.net; Mon, 14 May 2007 08:19:14 -0400 Received-SPF: none receiver=logan.com; client-ip=69.147.75.94; envelope-from=charliekohler@yahoo.com Received: (qmail 25406 invoked by uid 60001); 14 May 2007 12:18:35 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:MIME-Version:Content-Type:Message-ID; b=6kLeR6QBYBzdtLCNjU5mdoo6G49ZRaKVky+fTejKg3i3DJ1oWYrsqPCwVpDpdm+ZuEDuNk0sF2EICJGmF09F2J566zPFLDzc3qFiBnNJ3MrpIKjqg41TAq/RHoKrJHphjWl42WgBEOkrx8WR354Pr42nN0Gkc/ZbV/kR9O7pvUM=; X-YMail-OSG: idg6XMUVM1kbipeQffjhAq0GfybneKLrwymW9cDzuun8aePqJ75pzb21jw4v.a_WI33LSA0Flg-- Received: from [65.33.123.160] by web62502.mail.re1.yahoo.com via HTTP; Mon, 14 May 2007 05:18:35 PDT X-Mailer: YahooMailRC/651.23 YahooMailWebService/0.7.41.10 X-Original-Date: Mon, 14 May 2007 05:18:35 -0700 (PDT) From: Charlie Kohler Subject: Continental Engine fuel Sys. X-Original-To: LancairList MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-2131699501-1179145115=:24863" X-Original-Message-ID: <794284.24863.qm@web62502.mail.re1.yahoo.com> --0-2131699501-1179145115=:24863 Content-Type: text/plain; charset=ascii The thread regarding water/vent plugging issue has missed a potential cause of this problem. Having both Left/Right tank selections responding exactly alike would lead me to a common cause. One is-- a slit/crack/porosity in the diaphragm in the fuel manifold valve on top of the engine. If one exists --the engine driven pump will overcome it initially-- but then as leak (crack) enlarges-- it'll require electric pump lo-- then high to keep the engine running. This might be on one flight--or ten. But eventually the diaphragm will not contain the pressure to overcome the spring, closing the valve and the engine will quit. To test--Put a bucket under sniffle valve-- Remove the drain line (rubber hose on bottom of manifold valve) and turn pump on high mixture and throttle in. ANY fuel coming out drain is serious and the valve must be overhauled. Engines stored for long periods are really susceptible to this problem. Charlie K. --0-2131699501-1179145115=:24863 Content-Type: text/html; charset=ascii

The thread regarding water/vent plugging issue has missed a potential cause of this problem. Having both Left/Right tank selections responding exactly alike would lead me to a common cause. One is-- a slit/crack/porosity in the diaphragm in the fuel manifold valve on top of the engine.

If one exists --the engine driven pump will overcome it initially-- but then as leak (crack) enlarges-- it'll require electric pump lo-- then high to keep the engine running. This might be on one flight--or ten. But eventually the diaphragm will not contain the pressure to overcome the spring, closing the valve and the engine will quit.

To test--Put a bucket under sniffle valve-- Remove the drain line (rubber hose on bottom of manifold valve) and turn pump

on high mixture and throttle in. ANY fuel coming out drain is serious and the valve must be overhauled.

Engines stored for long periods are really susceptible to this problem.

Charlie K.

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