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IO-240 Fuel pump

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ftyoder(at)yoderbuilt.com
Guest

Posted: Sun Oct 06, 2013 11:02 am Post subject: IO-240 Fuel pump

I have a 1997 IO-240  and the fuel pump started leaking fuel again. It did this once before and I had  it rebuilt. The engine only has 518 HRS TT. Is there a problem with the pump? Do  the newer engines have the same pump?

  

 Any suggestions?  

  

 Thanks,

  

 Tim

   [quote][b]

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bakerocb

Joined: 15 Jan 2006
Posts: 727
Location: FAIRFAX VA

Posted: Sun Oct 06, 2013 5:52 pm Post subject: IO-240 Fuel pump

10/6/2013

  

 Hello Tim, I am sorry to hear that you are having a fuel leak problem with  the fuel pump on your IO-240 XXX engine. You wrote:

  

 1) “Is there a problem with  the pump?”

  

 The simple answer to that question is: Yes. The  complete answer can get complicated.

  

 2) “Do the newer engines have the same pump?”

  

 The simple answer to  that question is: Probably the same basic IO240 BXB pump, but with some  different subscript numbers attached to the basic pump P/N 653351. But again the  answer can get complicated.

  

 3) “Any  suggestions?”

  

 Yes. First download and review in some detail these two  publications so that you have a fairly firm grasp of exactly what fuel injection  assembly you have on your engine (probably a P/N 649059XX-X) and which pump you  are dealing with (probably a P/N 653351-XXX) and some past history on  modifications and changes to these fuel injection assemblies and  pumps.

  

 http://www.tcmlink.com/pdf2/CSB01-1.pdf

  

 http://www.tcmlink.com/pdf2/SIL98-6B.pdf

  

 Then, with these details readily at hand, give CM technical support people  a call at 888-826-5465 and get their advice on what to do next. Please let us  know how you make out. Thanks.

  

 OC

  

 'O C' Baker  says "The best investment you can make is the effort to gather and understand  information."

  

 PS: For  example: My IO-240 B9B engine, serial number 806236, manufactured on 9/1/1999  came with fuel pump P/N 653351-2. On 7/3/2001 I complied with TCM CSB 01-1 to  remove that pump and install pump P/N 653351-2A3.

  

 ======================

    

  From: Tim Yoder (ftyoder(at)yoderbuilt.com) 

 Sent: Sunday, October 06, 2013 3:03 PM

 To: kis-list(at)matronics.com (kis-list(at)matronics.com) 

 Subject: IO-240 Fuel pump

  



  I have a 1997 IO-240  and the fuel pump started leaking fuel again. It did this once before and I had  it rebuilt. The engine only has 518 HRS TT. Is there a problem with the pump? Do  the newer engines have the same pump?

  

 Any suggestions?  

  

 Thanks,

  

 Tim

[quote]

[b]

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ftyoder(at)yoderbuilt.com
Guest

Posted: Sun Oct 06, 2013 6:20 pm Post subject: IO-240 Fuel pump

Hello OC,

  

 Thank you for your response, I have the same fuel pump that  you had. Also, my engine S/N 806822 mfg. 4/18/97. Interesting that it is a  higher S/N than yours that was made almost 2 1/2 years later. I will read the  info you sent but what is the difference in the -2A3 pump.

  

 It was a close call yesterday, I was able to divert to a field  about 7 miles away and just made it with the rpm continuing to fall off. The  electric boost pump kept it running.

  

 Tim



   From: owner-kis-list-server(at)matronics.com  [mailto:owner-kis-list-server(at)matronics.com] On Behalf Of Owen Baker  

Sent: Sunday, October 06, 2013 6:52 PM

To:  kis-list(at)matronics.com; YODER TIM

Subject: IO-240 Fuel  pump

 

   10/6/2013

  

 Hello Tim, I am sorry to hear that you are having a fuel leak problem with  the fuel pump on your IO-240 XXX engine. You wrote:

  

 1) “Is there a problem with  the pump?”

  

 The simple answer to that question is: Yes. The  complete answer can get complicated.

  

 2) “Do the newer engines have the same pump?”

  

 The simple answer to  that question is: Probably the same basic IO240 BXB pump, but with some  different subscript numbers attached to the basic pump P/N 653351. But again the  answer can get complicated.

  

 3) “Any  suggestions?”

  

 Yes. First download and review in some detail these two  publications so that you have a fairly firm grasp of exactly what fuel injection  assembly you have on your engine (probably a P/N 649059XX-X) and which pump you  are dealing with (probably a P/N 653351-XXX) and some past history on  modifications and changes to these fuel injection assemblies and  pumps.

  

 http://www.tcmlink.com/pdf2/CSB01-1.pdf

  

 http://www.tcmlink.com/pdf2/SIL98-6B.pdf

  

 Then, with these details readily at hand, give CM technical support people  a call at 888-826-5465 and get their advice on what to do next. Please let us  know how you make out. Thanks.

  

 OC

  

 'O C' Baker  says "The best investment you can make is the effort to gather and understand  information."

  

 PS: For  example: My IO-240 B9B engine, serial number 806236, manufactured on 9/1/1999  came with fuel pump P/N 653351-2. On 7/3/2001 I complied with TCM CSB 01-1 to  remove that pump and install pump P/N 653351-2A3.

  

 ======================

    

  From: Tim Yoder (ftyoder(at)yoderbuilt.com) 

 Sent: Sunday, October 06, 2013 3:03 PM

 To: kis-list(at)matronics.com (kis-list(at)matronics.com) 

 Subject: IO-240 Fuel pump

  



  I have a 1997 IO-240  and the fuel pump started leaking fuel again. It did this once before and I had  it rebuilt. The engine only has 518 HRS TT. Is there a problem with the pump? Do  the newer engines have the same pump?

  

 Any suggestions?  

  

 Thanks,

  

 Tim

[quote]





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[b]

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bakerocb

Joined: 15 Jan 2006
Posts: 727
Location: FAIRFAX VA

Posted: Mon Oct 07, 2013 4:37 am Post subject: IO-240 Fuel pump

10/7/2013



Hello Tim, You wrote:



1) “It was a close call yesterday, I was able to divert to a field about 7 

miles away and just made it with the rpm continuing to fall off. The 

electric boost pump kept it running.”



Good move – must have been a significant leak from the engine driven fuel 

pump.



Q1) What electric boost pump do you have installed?



Q2) What fuel pressure(s) does it generate?



Q3) So your plane is now grounded at that other than home field?



Q4) Was the engine driven fuel pump leak external so that you could see the 

fuel dripping / running out with the engine running?



2) “I will read the info you sent but what is the difference in the -2A3 

pump.”



That I don’t know, but the change was significant enough for TCM to put out 

CSB01-1 and provide me the new -2A3 pump at their expense so they must have 

felt it to be pretty significant. When you talk to CM tech support you can 

ask them that question and pass the answer on to us.



3) "I have the same fuel pump that you had."



Q5) So your engine came with the P/N 653351-2 pump and you had it rebuilt in 

the field (not at TCM factory) when it leaked previously?

If so, that was probably one of the data points that led to the creation of 

CSB01-1.



Q6) What was the date of your previous engine driven fuel pump leak and 

repair?



4) "Interesting that it is a higher S/N than yours that was made almost 2 

1/2 years later."



Yes. I have also pondered that situation. I think that my engine was either 

lying around the factory for some reason (defect?) or returned to the 

factory from the field for some reason (defect?). Then when I specified the 

unique configuration of my IO-240 B9B engine** the factory saw an 

opportunity to cobble together my unique configuration engine and get rid of 

the engine lying around.



Thanks,



OC



**PS: I had studied in great detail the IO-240 XXX engine installations in 

the Diamond DA20-C1 and Eagle airplanes and designed my engine like choosing 

from a Chinese restaurant menu: 1 item from column A, 2 items from column B, 

and so forth. I thought that TCM should designate my engine configuration as 

the IO-240 OCB engine, but they went with the IO-240 B9B designation, the 

next number in the configuration sequence. As far as I know my engine is the 

only one made with that specific configuration.



I think that the IO-240 BXXB engine configuration numbers are now well up 

into the teens (or maybe higher even). It would be interesting to get a 

configuration matrix showing just exactly what configuration each engine has 

by configuration number. That information was hard to come by even back when 

I attended the TCM factory engine training course before ordering my engine. 

See here (but don't believe everything written here -- it is not accurate in 

every detail):



http://en.wikipedia.org/wiki/Continental_O-240



============================================================================



From: Tim Yoder

Sent: Sunday, October 06, 2013 10:21 PM

To: kis-list(at)matronics.com

Subject: RE: IO-240 Fuel pump



Hello OC,



Thank you for your response, I have the same fuel pump that you had. Also, 

my engine S/N 806822 mfg. 4/18/97. Interesting that it is a higher S/N than 

yours that was made almost 2 1/2 years later. I will read the info you sent 

but what is the difference in the -2A3 pump.



It was a close call yesterday, I was able to divert to a field about 7 miles 

away and just made it with the rpm continuing to fall off. The electric 

boost pump kept it running.



Tim



=================================================================================================



From: owner-kis-list-server(at)matronics.com 

[mailto:owner-kis-list-server(at)matronics.com] On Behalf Of Owen Baker

Sent: Sunday, October 06, 2013 6:52 PM

To: kis-list(at)matronics.com; YODER TIM

Subject: IO-240 Fuel pump

10/6/2013



Hello Tim, I am sorry to hear that you are having a fuel leak problem with 

the fuel pump on your IO-240 XXX engine. You wrote:



1) “Is there a problem with the pump?”



The simple answer to that question is: Yes. The complete answer can get 

complicated.



2) “Do the newer engines have the same pump?”



The simple answer to that question is: Probably the same basic IO240 BXB 

pump, but with some different subscript numbers attached to the basic pump 

P/N 653351. But again the answer can get complicated.



3) “Any suggestions?”



Yes. First download and review in some detail these two publications so that 

you have a fairly firm grasp of exactly what fuel injection assembly you 

have on your engine (probably a P/N 649059XX-X) and which pump you are 

dealing with (probably a P/N 653351-XXX) and some past history on 

modifications and changes to these fuel injection assemblies and pumps.



http://www.tcmlink.com/pdf2/CSB01-1.pdf



http://www.tcmlink.com/pdf2/SIL98-6B.pdf



Then, with these details readily at hand, give CM technical support people a 

call at 888-826-5465 and get their advice on what to do next. Please let us 

know how you make out. Thanks.



OC



'O C' Baker says "The best investment you can make is the effort to gather 

and understand information."



PS: For example: My IO-240 B9B engine, serial number 806236, manufactured on 

9/1/1999 came with fuel pump P/N 653351-2. On 7/3/2001 I complied with TCM 

CSB 01-1 to remove that pump and install pump P/N 653351-2A3.



=============================================================================================



From: Tim Yoder

Sent: Sunday, October 06, 2013 3:03 PM

To: kis-list(at)matronics.com

Subject: IO-240 Fuel pump



I have a 1997 IO-240 and the fuel pump started leaking fuel again. It did 

this once before and I had it rebuilt. The engine only has 518 HRS TT. Is 

there a problem with the pump? Do the newer engines have the same pump?



Any suggestions?



Thanks,



Tim

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