Fuel Boost Pump Overhaul

[rubixcube2k3]

So into the annual, and my boost pump appears to be needing a little attention. Does anyone have recommendations for a shop to overhaul? I've heard Aeromotors LLC does well. If I could find someone closer it would be awesome, but I'm not terribly picky about distance if they do great work. Thanks!

Warmest Regards, 

Abe

 

[jetdriven]

If its the Dukes 4140 or 1499 then Aeromotors is around 450$ otherwise its going to be sole-source Quality Aircraft Accessories for 1295$.  It also appears that C&J will still overhaul your 4140 unit (more wait time) for 850$.

 

The Type Certificate does allow the Weldon 8164A in place of the two Dukes models, which is a continuous-duty rated pump with a metal impeller, or so I think.  That is 775$ oh/exch from C&J or QAI.  But you might get them to take the Dukes for a core since it might be in higher demand.

[Jeev]

I may be mistaken but pretty sure when mine went bad in my J the best option was to order one from spruce. I then sent in my core and got $80

[Bob - S50]

I highly recommend Aeromotors LLC in Wisconsin.  We had to have our Dukes boost pump rebuilt (the impeller split into 4 pieces) and they were by far the cheapest way to go.  We shipped it to them, they overhauled it and had it on the way back in 2 days.  It was gone just over a week.

 

Bob

[Steve65E-NC]

Take your repair facility advice on overhall vs Inpect/Repair IRAN and yellow tag.  Often there are expensive parts replacements dictated by an overhaul that can really be left in place if they inspect ok.

[rbridges]

I looked at some older threads, and someone mentioned a CJ brand pump sold at Spruce.  It's around $1250 brand new.  I'm not sure if it's plug and play with a;dukes or not, but I'd go that route instead of overhauling it for the same.

 

http://www.aircraftspruce.com/catalog/eppages/cjaviation-newex.php

[Bob - S50]

I looked at some older threads, and someone mentioned a CJ brand pump sold at Spruce.  It's around $1250 brand new.  I'm not sure if it's plug and play with a;dukes or not, but I'd go that route instead of overhauling it for the same.

 

http://www.aircraftspruce.com/catalog/eppages/cjaviation-newex.php

That might have been me.  I looked into it and decided I could not use it on our J.  Can't remember why though.  Might be that there was no STC for if.  We ended up having ours repaired at Aeromotors LLC.  You can certainly check into it though.

 

Bob

[rbridges]

That might have been me.  I looked into it and decided I could not use it on our J.  Can't remember why though.  Might be that there was no STC for if.  We ended up having ours repaired at Aeromotors LLC.  You can certainly check into it though.

 

Bob

 

it may have been you, but the PDF shows that it's available up through K model mooneys.  There is a typo, I believe.  It lists D, E and G models for one pump.  I think the E is supposed to be a C.

[Andy95W]

it may have been you, but the PDF shows that it's available up through K model mooneys.  There is a typo, I believe.  It lists D, E and G models for one pump.  I think the E is supposed to be a C.

It is a typo. The part number for the M20C fuel pump is 4140-00-21; the replacement part from Spruce is 4140-00-21ACJ. The pump for the fuel injected engines (M20E) is -19.

You can find this from the Spruce catalog page under "Documents" and "Model Eligibility".

Good luck!

[rubixcube2k3]

Just wanted to provide an update: We shipped the pump to Aeromotors. WOW what service. I sent the return label, and a check for $400. They had the pump overhauled and returned in 3 days. Just now waiting to get it back on the plane and back in the air. Great customer service and great pricing. So far I am thoroughly impressed with them. Thanks to everyone who recommended them. I'll let write once more to let you know how the pump performs when we install it and test. 

 

Warmest Regards, 

Abe. 

[rbridges]

thanks for the update.  do you have a Dukes or Weldon pump?

[takair]

What are some of the symptoms of a bad pump or one that may be on its way out? The RPM of mine and fuel pressure seems to vary when first started. Still puts out in the green, but does not sound as healthy as it once did.

[jetdriven]

That's the mechanical fuel pump. But if it's a hot start that's normal. Dukes fuel pumps rarely fail, but they will leak out the weep hole on the exhaust tunnel.

[JaredDavis]

My bad Dukes pump had worn bearings. It was louder and louder over time. Pressure was fine.

[takair]

Reread my post and it is confusing. With the engine not running, when I do an initial prime, the RPM of the electric pump fluctuates and the fuel pressure fluctuates. Thinking it's a sign that the pump is going. I guess it's on the load side too...might be time...

[redars]

My boost pump works just fine , but it does drip 1 drop every two minutes out of the drain in the tunnel area.  This continues even with the fuel valve in the off position.  How much fuel is in that area?  M20E with

Dukes pump

[carusoam]

Leaking electric boost pumps are often caused by old seals.

They are easy to get them swapped out.

Leaks are not normal for Mooneys, unless you're talking wet wings...

Best regards,

-a-

[Alhall]

A few months back mine leaked fuel out the exhaust tunnel. It was the fuel pressure line to the gauge old and leaking. Did not take me long to get that fixed.

[takair]

Couldn't take it anymore. The noises my pump was making continued to get worse. The pressure would also fluctuate. At this point I figured it would give out at the wrong time or in the wrong place. Pulled the old Dukes pump yesterday. Looks like it was last overhauled in 1984. No mention of it in the logbook. Anyway, was looking at various Mooneyspace posts. I was originally going to send it out for overhaul, however, positive posts about Weldon pumps caught my eye. Looks like they now have a DROP IN replacement for the Dukes 4140-00-19A! It is the Weldon 18020-A. Looks like this is rather new. Check out the press release: http://www.weldonpumps.com/pdfs/releases/New_PMA_Replacement_Fuel_Boost_Pump.pdf?r=2. Spruce advertises it for $793. Seems like a reasonable alternative to overhaul, especially after adding in shipping costs and turn time.

Has anybody tried this? Going to order one tomorrow if no negative feedback.

[N601RX]

You can always recoup some of the cost by selling the old pump. It will be interesting to see if any replumbing is needed.

[takair]

New pump came in. Looks like a drop in. Will be installing it this week.

[jetdriven]

That looks nice. Continuous duty as well

[KSMooniac]

Most excellent!

[takair]

Finished the pump install today. Perfect drop in, no mods required. Checked out and flew fine too. The only thing I notice is that it has slightly more vibration than the previous. I can just feel that it through the floor...when the engine is at idle.

A couple of other lessons learned. Be sure you or your mechanic have the correct o'rings on hand for the fittings and filter. Also, be sure you install the fittings before installing the pump. You can't get enough rotation once in the aircraft. I don't want to talk about how I know that.

[rbridges]

Finished the pump install today. Perfect drop in, no mods required. Checked out and flew fine too. The only thing I notice is that it has slightly more vibration than the previous. I can just feel that it is on through the floor...when the engine is at idle.

A couple of other lessons learned. Be sure you or your mechanic have the correct o'rings on hand for the fittings and filter. Also, be sure you install the fittings before installing the pump. You can't get enough rotation once in the aircraft. I don't want to talk about how I know that.

 

great to hear.  too bad they don't have one available for the carbureted models.  at least I have the aeromotors rebuild or new CJ pump option when the time comes.