X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 2 [X] Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 14 May 2007 22:26:56 -0400 Message-ID: X-Original-Return-Path: Received: from elasmtp-spurfowl.atl.sa.earthlink.net ([209.86.89.66] verified) by logan.com (CommuniGate Pro SMTP 5.1.8) with ESMTP id 2044501 for lml@lancaironline.net; Mon, 14 May 2007 18:56:45 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.66; envelope-from=artbertolina@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=HBTna2JArY8m9tVHV7lkqP6STdVwAvGxzNIiNJ0Y6pvRjbY/TAL2BlOjErDIppgL; h=Received:Message-ID:From:To:References:Subject:Date:MIME-Version:Content-Type:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE:X-ELNK-Trace:X-Originating-IP; Received: from [206.55.133.78] (helo=LAPTOP2) by elasmtp-spurfowl.atl.sa.earthlink.net with asmtp (Exim 4.34) id 1HnjSZ-0001eY-Ii for lml@lancaironline.net; Mon, 14 May 2007 18:56:08 -0400 X-Original-Message-ID: <004401c7967b$0d0b59e0$4e00000a@LAPTOP2> From: "Art Bertolina" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] Continental Engine fuel Sys. X-Original-Date: Mon, 14 May 2007 15:56:03 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0041_01C79640.60034990" 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-ELNK-Trace: 1c57f4aab304e4a6fc8cc707cfd6285a4d2b10475b571120310b924280e5eed423e06333013b4205c6b317bf5bc479bb350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 206.55.133.78 This is a multi-part message in MIME format. ------=_NextPart_000_0041_01C79640.60034990 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Charlie this sound like it would be a good annual inspection check if it is not already. Art=20 ----- Original Message -----=20 From: Charlie Kohler=20 To: lml@lancaironline.net=20 Sent: Monday, May 14, 2007 6:29 AM Subject: [LML] Continental Engine fuel Sys. 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.=20 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. =20 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. =20 Engines stored for long periods are really susceptible to this = problem. =20 Charlie K. ------=_NextPart_000_0041_01C79640.60034990 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Charlie
this sound like it would be a good = annual=20 inspection check
if it is not already.
Art 
----- Original Message -----
From:=20 Charlie=20 Kohler
Sent: Monday, May 14, 2007 6:29 = AM
Subject: [LML] Continental = Engine fuel=20 Sys.

The thread regarding water/vent plugging issue has missed a = potential=20 cause of this problem. Having both Left/Right tank selections = responding=20 exactly alike would lead me to a common cause.  One is-- a=20 slit/crack/porosity  in the diaphragm in the fuel manifold valve = on top=20 of the engine.
If one exists --the engine driven pump will overcome it=20 initially-- but then as leak (crack) enlarges-- it'll require = electric=20 pump lo-- then high to keep the engine running. This might be on one=20 flight--or ten. But eventually the diaphragm will not contain the = pressure to=20 overcome the spring, closing the valve and the engine will=20 quit.  
To test--Put a bucket under sniffle valve-- Remove the drain line = (rubber=20 hose on bottom of manifold valve) and turn pump
on high mixture and throttle in. ANY fuel coming out = drain is=20 serious and the valve must be overhauled.   
Engines stored for long periods are really susceptible to this=20 problem.
 
Charlie K.=20
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