Return-Path: Received: from [24.25.9.102] (HELO ms-smtp-03-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 561432 for flyrotary@lancaironline.net; Thu, 09 Dec 2004 14:22:06 -0500 Received-SPF: none receiver=logan.com; client-ip=24.25.9.102; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-069-132-109-019.carolina.rr.com [69.132.109.19]) by ms-smtp-03-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id iB9JLXkd015328 for ; Thu, 9 Dec 2004 14:21:35 -0500 (EST) Message-ID: <002a01c4de24$4c5def70$2502a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" Subject: Fuel Leaks Date: Thu, 9 Dec 2004 14:21:34 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0027_01C4DDFA.633DE620" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0027_01C4DDFA.633DE620 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Went back out today to install the revised muffler (fewer inserts), = unfortunately did not get to check it out. After starting the engine to = let it warm up, I hopped out of the cockpit to get my sound meter. I = notice a wet spot below the fire wall on the concrete and killed the = engine. I turned out to be a fuel leak (actually two of them). The most serious was a leak in the fuel return line from the pressure = regulator to my header tank which is a low pressure line. In any case, = the fuel was bubbling out between the stainless steel braid about 2 1/2" = above the fitting and dropping straight down to the cowl (if had been = on). Line had been on the engine for 340 running hours and not in a = high heat area.=20 The other hose from the EFI pumps to the filters and injectors all = appear to be OK, which is interesting in that those are high pressure = areas. I used Earl's hoses for some of the braided steel lines - but = this time decided to use AeroEquip as a replacement. Second leak is apparently due to a fuel injector sticking open in that = whenever the EFI pumps are turned on there is fuel leaking from the = upper manifold block interface. So I understand Bernie {:>). Won't = know until I take off the manifold but I suspect that is one of = primaries (naturally - as they are hardest to get at). These are refurbished injectors supposedly cleaned and flow tested - = but, unless you buy new Mazda injectors at $235, you are getting = remanufactured injectors which are getting to be almost 15 years old in = some cases. =20 Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com ------=_NextPart_000_0027_01C4DDFA.633DE620 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Went back out today to install the = revised muffler=20 (fewer inserts), unfortunately did not get to check it out. After = starting=20 the engine to let it warm up, I hopped out of the cockpit to get my = sound=20 meter. I notice a wet spot below the fire wall on the concrete and = killed=20 the engine. I turned out to be a fuel leak (actually two of=20 them).

The most serious was a leak in the fuel = return line=20 from the pressure regulator to my header tank which is a low pressure=20 line. In any case, the fuel was bubbling out between the = stainless=20 steel braid about 2 1/2" above the fitting and dropping straight down to = the=20 cowl (if had been on). Line had been on the engine for 340 running = hours=20 and not in a high heat area.

The other hose from the EFI pumps to = the filters=20 and injectors all appear to be OK, which is interesting in that those = are high=20 pressure areas. I used Earl's hoses for some of the braided steel = lines -=20 but this time decided to use AeroEquip as a replacement.

Second leak is apparently due to a fuel = injector=20 sticking open in that whenever the EFI pumps are turned on there is fuel = leaking=20 from the upper manifold block interface. So I understand Bernie=20 {:>). Won't know until I take off the manifold but I suspect = that is=20 one of primaries (naturally - as they are hardest to get = at).

These are refurbished injectors = supposedly cleaned=20 and flow tested - but, unless you buy new Mazda injectors at $235, you = are=20 getting remanufactured injectors which are getting to be almost 15 = years=20 old in some cases.

Ed Anderson
Rv-6A N494BW Rotary=20 Powered
Matthews, NC
eanderson@carolina.rr.com

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