X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 24 Sep 2014 13:19:10 -0400 Message-ID: X-Original-Return-Path: Received: from mail.rbr3.com ([72.15.229.5] verified) by logan.com (CommuniGate Pro SMTP 6.0.9e) with ESMTPS id 7172331 for lml@lancaironline.net; Wed, 24 Sep 2014 10:21:27 -0400 Received-SPF: pass receiver=logan.com; client-ip=72.15.229.5; envelope-from=Shane@rbr3.com Received: from RBR-SERVER.rbr3.local ([fe80::dd9:5680:cac1:9a86]) by RBR-SERVER.rbr3.local ([fe80::dd9:5680:cac1:9a86%11]) with mapi; Wed, 24 Sep 2014 10:15:55 -0400 From: Shane Bangerter X-Original-To: Lancair Mailing List X-Original-Date: Wed, 24 Sep 2014 10:15:52 -0400 Subject: RE: [LML] Mechanical Fuel Pump Oddities Thread-Topic: [LML] Mechanical Fuel Pump Oddities Thread-Index: Ac/X5+Qt+cBFDHRDTze3SMGho37YmwAFuYwQ X-Original-Message-ID: References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: multipart/alternative; boundary="_000_F86615B51FD0F24B80B59522E5CB0E7BCE6B4DF24FRBRSERVERrbr3_" MIME-Version: 1.0 --_000_F86615B51FD0F24B80B59522E5CB0E7BCE6B4DF24FRBRSERVERrbr3_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable I agree with Steve except I leave the low boost off during taxi and run up = but turn it on before the takeoff roll and leave it on until back on the gr= ound. My mechanic was told by CJ Aviation (828 871 0421) who overhauled my= fuel pump, the pump has ran continuously in tests for over a 1,000 hours= w/o failure. I also recommend you purge each tank before start up to rem= ove any air in the lines which should prevent a loss of fuel to the engine = when switching tanks. Shane IV-P 420 hrs From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Stev= e Colwell Sent: Wednesday, September 24, 2014 6:13 AM To: Lancair Mailing List Subject: [LML] Mechanical Fuel Pump Oddities Kevin, I had the same problem on a warm day with warm fuel from an above ground ta= nk. My solution is to leave Low Boost on all the time. The Dukes pump is = not rated for continuous operation but mine is still running at 200+ hours.= Another plus is, if your engine pump fails on takeoff, Low Boost will pro= bably keep the engine running (maybe at reduced power but still running). = I believe Continental recommends Low Boost above 10,000' so the best explan= ation could be "they do that". Steve Colwell IO-550 Legacy --_000_F86615B51FD0F24B80B59522E5CB0E7BCE6B4DF24FRBRSERVERrbr3_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

I agree with Steve excep= t I leave the low boost off during taxi and run up but turn it on before the takeoff = roll and leave it on until back on the ground.  My mechanic was told by CJ Aviation (828 871 0421) who overhauled my fuel  pump,  the pump h= as ran continuously in tests for over a 1,000 hours w/o failure.   I= also recommend you purge each tank before start up to remove any air in the line= s which should prevent a loss of fuel to the engine when switching tanks.

 =

Shane  <= /span>

IV-P 420 hrs  =

 =

From: Lancair Maili= ng List [mailto:lml@lancaironline.net] On Behalf Of Steve Colwell
Sent: Wednesday, September 24, 2014 6:13 AM
To: Lancair Mailing List
Subject: [LML] Mechanical Fuel Pump Oddities

 

Kevin,

 

I had the same problem on a warm day with warm fuel fr= om an above ground tank.  My solution is to leave Low Boost on all the time.  The Dukes pump is not rated for continuous operation but mine i= s still running at 200+ hours.  Another plus is, if your engine pump fai= ls on takeoff, Low Boost will probably keep the engine running (maybe at reduc= ed power but still running).  I believe Continental recommends Low Boost above 10,000’ so the best explanation could be “they do that”.

 

Steve Colwell  IO-550 Legacy

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