X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from nm13-vm0.access.bullet.mail.mud.yahoo.com ([66.94.236.13] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with SMTP id 5039924 for flyrotary@lancaironline.net; Fri, 01 Jul 2011 15:34:06 -0400 Received-SPF: none receiver=logan.com; client-ip=66.94.236.13; envelope-from=ceengland@bellsouth.net Received: from [66.94.237.194] by nm13.access.bullet.mail.mud.yahoo.com with NNFMP; 01 Jul 2011 19:33:31 -0000 Received: from [66.94.237.119] by tm5.access.bullet.mail.mud.yahoo.com with NNFMP; 01 Jul 2011 19:33:31 -0000 Received: from [127.0.0.1] by omp1024.access.mail.mud.yahoo.com with NNFMP; 01 Jul 2011 19:33:31 -0000 X-Yahoo-Newman-Id: 163695.81033.bm@omp1024.access.mail.mud.yahoo.com Received: (qmail 56651 invoked from network); 1 Jul 2011 19:33:31 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bellsouth.net; s=s1024; t=1309548810; bh=vljMd9nJT1geuEArTqWqSWW43qnky8pHgXEO+fFlEtk=; h=Received:X-Yahoo-SMTP:X-YMail-OSG:X-Yahoo-Newman-Property:Message-ID:Date:From:Reply-To:User-Agent:MIME-Version:To:Subject:References:In-Reply-To:Content-Type; b=NMHozslQyGipxp7l8BqGe8um4omiBzLu06BcGkGMlGaM+nWWt9Y31LW9OUhiwQR4+7p5bSg/CBLMarAoiGZJXvgBaQ4FVxdbbuHEcFNENvP+CUIK8uIOdNQijv5n5BGGsvCD5/CHXj8ThZWtAiKiuY3kAMq735PWv+5gneqgWdk= Received: from [192.168.10.14] (ceengland@98.95.236.144 with plain) by smtp102.sbc.mail.mud.yahoo.com with SMTP; 01 Jul 2011 12:33:30 -0700 PDT X-Yahoo-SMTP: uXJ_6LOswBCr8InijhYErvjWlJuRkoKPGNeiuu7PA.5wcGoy X-YMail-OSG: q3LxykoVM1mCiMSM5JynAi4dnxmQH9ZVZm6NpqPFMueR0dz U.X9wiE5.5JZQJJ.vKsV79nazB9VN.023KwhdKIENC5Vd101GRovFApLj2ey .miDIYdwhMmxT2bQL_sTnFofWPD_KioOrquhMJQfPk45MNxLfZq6CJAiKFwd JKNikTUKaaatWniz5WyYIbTAchKpJYJPIZIMmll76oMQ99vm23Dlbcp2SOR_ 4bJuVJb7U4GiuzehYzlU64l9FA0gWS9ow00sMEqw0_sfSNUVCdGKn_P_4OeR ya6eD4QQPl5TQUB4ZtUOE3bJwoMoTOp3MOkzZmWRn0FRs4mZw1i6IP4ON2Z5 K5AJWcmrMIB5ZDhxCAyv.mpBDjJqwD4Y0yFKAFqlRAx3ZDFeEgaKxb3By5_C 0c0rnl0v.gj8B8UGNMMBn26DeVlzCNtejZgbzLuGzSQG.qWyCr6WvnIRoNXt 5cJwU6Tw2Ao_b4_rTb7avyOdnSFpEMp73uXtjYcGWaauuaZmgzeBgkGOQp.Y DD.pgV1L69wsAAMEzruQOOWwUWONS_e0MZbzOiiWQsgEdtWZqYf9QKGsTy4h UxvkdbzXZQPFWXZGF8TmGCOGzcpGtN49ZZegk X-Yahoo-Newman-Property: ymail-3 Message-ID: <4E0E2109.5050809@bellsouth.net> Date: Fri, 01 Jul 2011 14:33:29 -0500 From: Charlie England Reply-To: ceengland@bellsouth.net User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.17) Gecko/20110516 Thunderbird/3.1.10 MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: GSL393/74028 Fuel Pump Replacement/Fuel Leak References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------090002070606050205070408" This is a multi-part message in MIME format. --------------090002070606050205070408 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Kelly nailed it; the Walbro pumps I've seen have no provision for O-ring seals. Try the crush washers. On 07/01/2011 12:39 PM, Kelly Troyer wrote: > Group, > The "Russell" fitting from "Summit" appears to come with a soft > aluminum sealing > washer..........All the stock oil fittings on the "Mazda" engines > (engine, oil cooler, etc) > have a aluminum or copper sealing washer...........FWIW > http://www.summitracing.com/parts/RUS-670470/ > Kelly Troyer > *"DYKE DELTA JD2" (Eventually)* > "13B ROTARY"_ Engine"RWS"_RD1C/EC2/EM2 > "MISTRAL"_Backplate/Oil Manifold > "TURBONETICS"_TO4E50 Turbo > > *From:* Steven W. Boese > *To:* Rotary motors in aircraft > *Sent:* Friday, July 1, 2011 12:03 AM > *Subject:* [FlyRotary] Re: GSL393/74028 Fuel Pump Replacement/Fuel Leak > Scott, > I have used the pumps with the 10mmx1.0 connection without leak > problems. I use a soft aluminum or soft copper crush washer between > the pump and fitting, not a rubber o-ring. The mating surfaces should > be square and smooth and could be retooled in a lathe if needed. The > thread is a straight thread, not tapered, so it doesn't seem like > trying to seal the joint in the threads with tape or other sealant > would work very well. > Steve Boese > > *From:* Scott > *Sent:* Wednesday, June 29, 2011 9:56 PM > *To:* Rotary motors in aircraft > > *Subject:* [FlyRotary] GSL393/74028 Fuel Pump Replacement/Fuel > Leak > I have inline fuel pumps from Tracy from a while back. They > were from Napa and were the 74028 flavor( > http://www.summitracing.com/parts/CRT-P74028/?rtype=10 seems > most like them currently ) Tracy used to provide. > > The fixed hose barb side of course does not leak, but on the > screw fitting side I have a 10mmx1.0( > http://www.summitracing.com/parts/RUS-670480/ ) with an o-ring > and everytime I think I have the fuel drip fixed and start the > pump without the engine it doesn't leak. But, after a short > engine run the drip returns. > > As I burned out one of the pumps already( important safety > note make sure the fuel selector valve is not off while you > have the pump turned on and are checking for leaks ) and will > need to replace it what other inline pumps have folks been > using? The 74028 flavor fuel pumps, the 10mm fits but does > not seal. I did not use thread tape or other thread sealer. > And no amount of tightening seems to keep it from leaking again. > > Thoughts on a fuel pump substitute? Way to seal that fitting > to the existing 74028 pump? > > Thank You. > -Scott > http://n820wa.blogspot.com/2011/06/engine-runs.html > > > -----Inline Attachment Follows----- > > -- Homepage: http://www.flyrotary.com/ Archive and > UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html > --------------090002070606050205070408 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Kelly nailed it; the Walbro pumps I've seen have no provision for O-ring seals. Try the crush washers.

On 07/01/2011 12:39 PM, Kelly Troyer wrote:
Group,
    The "Russell" fitting from "Summit" appears to come with a soft aluminum sealing
washer..........All the stock oil fittings on the "Mazda" engines (engine, oil cooler, etc)
have a aluminum or copper sealing washer...........FWIW
 
 
Kelly Troyer
"DYKE DELTA JD2" (Eventually)
"13B ROTARY"_ Engine"RWS"_RD1C/EC2/EM2
"MISTRAL"_Backplate/Oil Manifold
"TURBONETICS"_TO4E50 Turbo

From: Steven W. Boese <SBoese@uwyo.edu>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Friday, July 1, 2011 12:03 AM
Subject: [FlyRotary] Re: GSL393/74028 Fuel Pump Replacement/Fuel Leak
Scott,
 
I have used the pumps with the 10mmx1.0 connection without leak problems.  I use a soft aluminum or soft copper crush washer between the pump and fitting, not a rubber o-ring.  The mating surfaces should be square and smooth and could be retooled in a lathe if needed.  The thread is a straight thread, not tapered, so it doesn't seem like trying to seal the joint in the threads with tape or other sealant would work very well.
 
Steve Boese

 
 
From: Scott
Sent: Wednesday, June 29, 2011 9:56 PM
Subject: [FlyRotary] GSL393/74028 Fuel Pump Replacement/Fuel Leak
I have inline fuel pumps from Tracy from a while back.  They were from Napa and were the 74028 flavor( http://www.summitracing.com/parts/CRT-P74028/?rtype=10 seems most like them currently ) Tracy used to provide.

The fixed hose barb side of course does not leak, but on the screw fitting side I have a 10mmx1.0( http://www.summitracing.com/parts/RUS-670480/ ) with an o-ring and everytime I think I have the fuel drip fixed and start the pump without the engine it doesn't leak.  But, after a short engine run the drip returns. 

As I burned out one of the pumps already( important safety note make sure the fuel selector valve is not off while you have the pump turned on and are checking for leaks ) and will need to replace it what other inline pumps have folks been using?  The 74028 flavor fuel pumps, the 10mm fits but does not seal.  I did not use thread tape or other thread sealer.  And no amount of tightening seems to keep it from leaking again.

Thoughts on a fuel pump substitute?  Way to seal that fitting to the existing 74028 pump?

Thank You.
-Scott
http://n820wa.blogspot.com/2011/06/engine-runs.html

-----Inline Attachment Follows-----

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