X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 25 Sep 2014 10:38:02 -0400 Message-ID: X-Original-Return-Path: Received: from nm17-vm2.bullet.mail.ne1.yahoo.com ([98.138.91.93] verified) by logan.com (CommuniGate Pro SMTP 6.0.9e) with ESMTPS id 7174484 for lml@lancaironline.net; Thu, 25 Sep 2014 09:21:44 -0400 Received-SPF: pass receiver=logan.com; client-ip=98.138.91.93; envelope-from=mcmess1919@yahoo.com DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s2048; d=yahoo.com; b=JqLmOp97ooG8sl0IjCf9Z++rgV9THmL7dpmOYqXDWACZb9M1T6ZkHSu7dyGztNcfgWOr8/tKVMnW5hTPaLks94OjN7bZV5eO+HSZXxaRaFYeHyyhrEtOmq15dKjT6VRg21UV2joZbFdZwehoTp/ibUIudXCiRUby6xdsI3GprR7bYjszqjG7xL1BdlLNfBFKccBe0xGl8XIYTAkr0r850/Nb/FClZhPFxbchkpMe2Y3JFGzIhoUSD6vzAeiaQPIDMwHWz4E19Wl7CZI7mNGIms3C3adp5XBRUhEsxGUqC+3/XH6wG6RHCX3YsTLkR4SIheZN12vskdTYBPU284rV6w==; Received: from [98.138.100.102] by nm17.bullet.mail.ne1.yahoo.com with NNFMP; 25 Sep 2014 13:21:08 -0000 Received: from [98.138.84.45] by tm101.bullet.mail.ne1.yahoo.com with NNFMP; 25 Sep 2014 13:21:08 -0000 Received: from [127.0.0.1] by smtp113.mail.ne1.yahoo.com with NNFMP; 25 Sep 2014 13:21:08 -0000 X-Yahoo-Newman-Id: 433951.28247.bm@smtp113.mail.ne1.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: mE3zHkQVM1naum2EnB_A8tqaSj5L4wLvzS_TUwBDgE7Klrp IkpCwLhJi5dnQ1sCNWOnh2KbD2TwRJPwkmQE0VyvkZ1470G.SOwZDQdyWwNk vNPvZZrMxVTm0wt2lzC._cZ7zyz8w930mDrGIpyq8l0fGimx_.z8mf2wi0Nr UPkQ.LMfJQrHwuQHrJL0I79shD_GzVPBdxmPNlMsH4hZ7tL77Tz8BRaP6awV GFcT9F6iOpVxFo5e8WoOvZApb9Qa9i.s1NMS_SFpHrpKs_1A9bx7H0D2z.10 KPp1mo2MZrMjpRG5bePWCtKAN8ZUNZLXY3Ra.WSOj0_W84OOQzT1Um47K5zi DgCtt.yR.D8Dz.DzONkjL3Ntyh11eCIvlv948gQlBAnGP.wt68NnN_hChS0U pcU5hVUCsoOGz6WwIfS5usJfrh81PpHDwovedjGhamGKYcCibtjamYAShhwV fiMNVRgbV1YrnCb23uoeZZYCdSEPjfuOXM80ONmbNhUfW1qluvHoNKUDAND5 99EH2RvT4Vk7BM2WCPpGgV7xbw2h1 X-Yahoo-SMTP: rK4i7HqswBC7mDE8.sOiWQeO4CeReXc- From: "Steve Colwell" X-Original-To: "'Lancair Mailing List'" Subject: Mechanical Fuel Pump Oddities X-Original-Date: Thu, 25 Sep 2014 08:21:14 -0500 X-Original-Message-ID: <03ea01cfd8c3$95abcb80$c1036280$@com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_03EB_01CFD899.ACD5C380" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: Ac/Yw5R/k2bINTQaSUevV6/g+ehLCQ== Content-Language: en-us This is a multi-part message in MIME format. ------=_NextPart_000_03EB_01CFD899.ACD5C380 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Shane, Thanks for the clarification. I should not have said "leave Low Boost on all the time." I don't use Low Boost until after run up, to verify the engine driven pump is working. We flew for over 200 hours without Low Boost with no noticeable problem. Steve Colwell 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 ground. 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 remove 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 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 from 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 is still running at 200+ hours. Another plus is, if your engine pump fails on takeoff, Low Boost will probably keep the engine running (maybe at reduced 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 ------=_NextPart_000_03EB_01CFD899.ACD5C380 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Shane,

 

Thanks for = the clarification.  I should not have said “leave Low Boost = on all the time.”  I don’t use Low Boost until after = run up, to verify the engine driven pump is working.  We flew for = over 200 hours without Low Boost with no noticeable = problem.

 

Steve Colwell

 

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 ground. =  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 remove 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 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 from 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 is still = running at 200+ hours.  Another plus is, if your engine pump fails = on takeoff, Low Boost will probably keep the engine running (maybe at = reduced 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

 

------=_NextPart_000_03EB_01CFD899.ACD5C380--