Return-Path: Sender: "Marvin Kaye" To: lml@lancaironline.net Date: Sun, 10 Oct 2004 18:15:22 -0400 Message-ID: X-Original-Return-Path: Received: from imo-d06.mx.aol.com ([205.188.157.38] verified) by logan.com (CommuniGate Pro SMTP 4.2.4) with ESMTP id 459710 for lml@lancaironline.net; Sun, 10 Oct 2004 17:47:57 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.188.157.38; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-d06.mx.aol.com (mail_out_v37_r3.8.) id q.193.30530fbd (25305) for ; Sun, 10 Oct 2004 17:47:22 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: <193.30530fbd.2e9b07ea@aol.com> X-Original-Date: Sun, 10 Oct 2004 17:47:22 EDT Subject: Re: [LML] Mechanical Fuel Pump Failure? X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1097444842" X-Mailer: 9.0 for Windows sub 5000 -------------------------------1097444842 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 10/10/2004 4:01:38 PM Central Standard Time, LHenney@attg.net writes: 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. Larry, Sporadic drops in pressure are often due to air in the line. Boost pumps have been occasionally tagged as the perpetrator of the leak that introduces air, even though the boost pump restores the pressure (24-28 psi, anything above about 14 psi works marginally). Another, of course, is a hot line that vaporizes the fuel - any changes since things were working fine? Hmmmmmm, where is the pressure sensor located in the system. Any possible slightly loose fuel line connections? Is the airplane named Christine? Hard to believe that two pimps failed in a row. Hmmmm, the i is next to the u. Otherwise, just bad luck with two bad pumps?? Scott Krueger AKA Grayhawk N92EX IO320 Aurora, IL (KARR) Some Assembly Required Using Common Hand Tools And Bakerseal. -------------------------------1097444842 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 10/10/2004 4:01:38 PM Central Standard Time,=20 LHenney@attg.net writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>

I have a= friend=20 who has replaced his mechanical pump on an IO-360 twice due to low=20 pressure. It normally ran around 23 psi and was replaced because it=20 sporadically dropped to about 7 psi. We are considering the unique=20 apparent failure of a second pump after only 35 hours. =20

<= /DIV>

Larry,

Sporadic drops in pressure are often due to air in the line. Boos= t=20 pumps have been occasionally tagged as the perpetrator of the leak that= =20 introduces air, even though the boost pump restores the pressure (24-28 psi,= =20 anything above about 14 psi works marginally). Another, of course, is=20= a=20 hot line that vaporizes the fuel - any changes since things were working=20 fine? Hmmmmmm, where is the pressure sensor located in the system.&nbs= p;=20 Any possible slightly loose fuel line connections? Is the airplane nam= ed=20 Christine?

Hard to believe that two pimps failed in a row. Hmmmm, the i is n= ext=20 to the u.

Otherwise, just bad luck with two bad pumps??=20

Scott Krueger=20 AKA Grayhawk
N92EX IO320 Aurora, IL (KARR)

Some Assembly Required=20
Using Common Hand Tools

And Bakerseal.

-------------------------------1097444842--