Return-Path: Received: from outbound-mail.nyc.untd.com ([64.136.20.164] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with SMTP id 542497 for flyrotary@lancaironline.net; Mon, 22 Nov 2004 20:28:15 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.136.20.164; envelope-from=jbker@juno.com Received: from outbound21-sr.nyc.untd.com (webmail30.nyc.untd.com [10.141.27.170]) by smtpout02.nyc.untd.com with SMTP id AABA4FESHARQX2ZS for (sender ); Mon, 22 Nov 2004 17:27:35 -0800 (PST) X-UNTD-OriginStamp: Y+Mfppm2QyGfnY/dq+iW1YLfgSNiM2RC0CDroQxbF7RNWSIyuPBGeg== Received: (from jbker@juno.com) by webmail30.nyc.untd.com (jqueuemail) id KC37N6Q3; Mon, 22 Nov 2004 17:27:00 PST Received: from [4.234.135.10] by webmail30.nyc.untd.com with HTTP: Tue, 23 Nov 2004 01:26:34 GMT X-Originating-IP: [4.234.135.10] Mime-Version: 1.0 From: "jbker@juno.com" Date: Tue, 23 Nov 2004 01:26:34 GMT To: flyrotary@lancaironline.net, finn.lassen@verizon.net Subject: Bubbles for Fin X-Mailer: WebMail Version 2.0 Content-Type: text/plain Message-Id: <20041122.172700.532.111998@webmail30.nyc.untd.com> X-ContentStamp: 1:1:1181312198 Fin, I would suggest that you go ahead and add clear line (sorry Ed Anderson) between the fuel pump and the tank. If the bubbles are coming from above than you do have a leak above the pump. Are the bubbles that you are seeing downstream of the pump being washed down with the flow ,or are they bucking the flow and coming back to the pump. If they are going with the flow , I think you can rule out cavitation and vaporization as possibilities. You have a positive head on the pump and it is at cockpit temperature is why I think this. I still hold out that you have an airleak between the tank and the pump since you say the vent is open. Bernie Kerr