Sender: <marv@lancaironline.net> (Marvin Kaye)
To: lml@lancaironline.net
Date: Fri, 21 Nov 2003 19:48:20 -0500
Message-ID: <redirect-2760947@logan.com>
From: Tubamanflies@aol.com
Subject: "Dukeing" it out with the boost pump
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This is a follow up on the rough running engine post.

The rough running engine was due to an leak that was putting air into the 
fuel.  The source was the seal of the "Duke" boost pump.

Once the problems was identified I pulled the pump and started looking for a 
place to get it rebuilt.  The 1500-00-67 part number did not match up with 
anything any of the rebuilder could do.  I even called Dukes and they could not 
match it up.  Finally both Dukes and the rebuilder called me back and said to 
send it in and they would rebuild it.  It turned out to be only $100 less than 
a new one from Lancair so I ordered a new one.  Unfortunatally the new one 
they sent was wrong.  Not there fault reallly.  The box was correct but the pump 
in it was wrong.   I did learn that the new pump has different connections 
then the old one.  The old 1550-00-67 had 3/8 straight thread o-ring connections. 
 The new pumps use 1/2" connections.  My fuel system uses 3/8 tube and hose 
so the fittings from the old pump did not work.  When Vern from Lancair sent 
the pump to replace the one in the wrong box he included the 1/2" o ring to 3/8" 
tube fittings.  

As a heads up.  If you have to buy a new pump from either Lancair or someone 
else make sure that you get the right fittings.   The old pumps supplied by 
Lancair had 3/8" connections.  The new pumps have 1/2" connections.  

The pump went on today and the bird flew shortly afterwards.  Big differnce.  
No rough running engine.  The pump builds pressure in several seconds.  It 
used to take about 15 sec at least.  Also the engine driven pump develops better 
pressure now.

I know one flight does not a solution make but I thing the problem is fixed.  


Ray Gardner .  

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<HTML><FONT FACE=3Darial,helvetica><FONT  SIZE=3D2 FAMILY=3D"SANSSERIF" FACE=
=3D"Arial" LANG=3D"0">This is a follow up on the rough running engine post.<=
BR>
<BR>
The rough running engine was due to an leak that was putting air into the fu=
el.&nbsp; The source was the seal of the "Duke" boost pump.<BR>
<BR>
Once the problems was identified I pulled the pump and started looking for a=
 place to get it rebuilt.&nbsp; The 1500-00-67 part number did not match up=20=
with anything any of the rebuilder could do.&nbsp; I even called Dukes and t=
hey could not match it up.&nbsp; Finally both Dukes and the rebuilder called=
 me back and said to send it in and they would rebuild it.&nbsp; It turned o=
ut to be only $100 less than a new one from Lancair so I ordered a new one.&=
nbsp; Unfortunatally the new one they sent was wrong.&nbsp; Not there fault=20=
reallly.&nbsp; The box was correct but the pump in it was wrong.&nbsp;&nbsp;=
 I did learn that the new pump has different connections then the old one.&n=
bsp; The old 1550-00-67 had 3/8 straight thread o-ring connections.&nbsp; Th=
e new pumps use 1/2" connections.&nbsp; My fuel system uses 3/8 tube and hos=
e so the fittings from the old pump did not work.&nbsp; When Vern from Lanca=
ir sent the pump to replace the one in the wrong box he included the 1/2" o=20=
ring to 3/8" tube fittings.&nbsp; <BR>
<BR>
As a heads up.&nbsp; If you have to buy a new pump from either Lancair or so=
meone else make sure that you get the right fittings.&nbsp;&nbsp; The old pu=
mps supplied by Lancair had 3/8" connections.&nbsp; The new pumps have 1/2"=20=
connections.&nbsp; <BR>
<BR>
The pump went on today and the bird flew shortly afterwards.&nbsp; Big diffe=
rnce.&nbsp; No rough running engine.&nbsp; The pump builds pressure in sever=
al seconds.&nbsp; It used to take about 15 sec at least.&nbsp; Also the engi=
ne driven pump develops better pressure now.<BR>
<BR>
I know one flight does not a solution make but I thing the problem is fixed.=
&nbsp; <BR>
<BR>
Ray Gardner .&nbsp; </FONT></HTML>

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