Return-Path: Sender: "Marvin Kaye" To: lml@lancaironline.net Date: Sun, 10 Oct 2004 17:01:11 -0400 Message-ID: X-Original-Return-Path: Received: from mxsf11.cluster1.charter.net ([209.225.28.211] verified) by logan.com (CommuniGate Pro SMTP 4.2.4) with ESMTP id 459635 for lml@lancaironline.net; Sun, 10 Oct 2004 16:43:12 -0400 Received-SPF: none receiver=logan.com; client-ip=209.225.28.211; envelope-from=LHenney@attg.net Received: from mxip03.cluster1.charter.net (mxip03a.cluster1.charter.net [209.225.28.133]) by mxsf11.cluster1.charter.net (8.12.11/8.12.11) with ESMTP id i9AKgfYE017144 for ; Sun, 10 Oct 2004 16:42:41 -0400 Received: from 68.116.152.31.ts46v-21.grnbry.ftwrth.tx.charter.com (HELO b8p5r1) (68.116.152.31) by mxip03.cluster1.charter.net with ESMTP; 10 Oct 2004 16:42:41 -0400 X-Ironport-AV: i="3.85,131,1094443200"; d="scan'217,208"; a="344727320:sNHT20589780" From: "Larry Henney" X-Original-To: "Lancair List" Subject: Mechanical Fuel Pump Failure? X-Original-Date: Sun, 10 Oct 2004 15:42:20 -0500 X-Original-Message-ID: <000c01c4af09$a705fb10$05000100@b8p5r1> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000D_01C4AEDF.BE2FF310" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.2627 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_000D_01C4AEDF.BE2FF310 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Guys, I have a friend who has replaced his mechanical pump on an IO-360 twice due to low pressure. It normally ran around 23 psi and was replaced because it sporadically dropped to about 7 psi. We are considering the unique apparent failure of a second pump after only 35 hours. The fuel line was trouble shot for leaks in pressure (40 psi) and to a 20 psi vacuum and it is good to either tank. Vent lines are also both clear. I am looking for information about the nature of an engine side failure. That is, does the cam? or pushrod? device which drives the pump arm wear? If so, is failure ascertained through measuring the throw of the plunger? The second pump is also being sent back for bench testing. I would love to hear the thoughts of those with insight into the function of the drive portion of the mechanical fuel pump. Larry Henney ------=_NextPart_000_000D_01C4AEDF.BE2FF310 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
Guys,
 
I have = a friend who=20 has replaced his mechanical pump on an IO-360 twice due to low = pressure. =20 It normally ran around 23 psi and was replaced because it sporadically = dropped=20 to about 7 psi. We are considering the unique apparent failure of a = second=20 pump after only 35 hours. 
 
The = fuel line was=20 trouble shot for leaks in pressure (40 psi) and to a 20 psi vacuum and = it is=20 good to either tank.  Vent lines are also both = clear.
 
I am = looking for=20 information about the nature of an engine side failure.  That is, = does the=20 cam? or pushrod?  device which drives the pump arm wear?  If = so, is=20 failure ascertained through measuring the throw of the plunger? =20
 
The = second pump is=20 also being sent back for bench testing.
 
I = would love to hear=20 the thoughts of those with insight into the function of the drive = portion of the=20 mechanical fuel pump.
 
Larry=20 Henney
 
 
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