fuel pump

[Heyno Sauermann]

Any leads on an after market fuel pump other than the $1000 Bosch.  My short pump won't run under pressure-the diagnoses points to degraded permanent magnets.

[Pinder]

What makes you  think its the magnets? how did you test that? I would think all it needs is a rebuild.  you can get  a rebuild kit and try that. from Vintage Euro parts. with new impeler and armature etc. I would highly doubt its the magnets.

[Heyno Sauermann]

I'm well into the project.  New brushes and impeller.  Bushings have all been measured , rotor checked for shorts etc.
Runs fine on bench - add fuel to the equation and it stops....

[MikeSimon]

Isn't there a member here who rebuilds them? Or sells rebuilt units in exchange for cores? Baron Youngman?

[Tycoon]

 I purchased a temporary Carter P4601 hp with correct fuel circulation rates, etc. till I got my original Bosch rebuilt by Fuel injection Corp in California. The Carter is affordable, and works great, but slightly loader.  You may not need to spend the $ on your original, until you are ready……at least you’re driving!

Bill

[BobH]

Not wishing to teach you how to suck eggs, but are you sure the polarity is correct and the pump is running in the right direction, assume no fuel delivery if the pump runs the wrong way, but is there a chance it could stop the pump from running?

[Pinder]

check impeller is right way up.

[stickandrudderman]

For those not bothered by originality I recently discovered this pump:
https://www.thinkauto.com/acatalog/On_line_shop_Holley_328.html

They sell it without the regulator and it appears to have all the specs to satisfy the needs of the 113. It looks similar too which might help.

[Cees Klumper]

Stick, I get a 'not found' when I click the link, can you repost please? I am sure this will be of great interest to us all. Thanks,

[BobH]

Needed to remove the 1 from the end

https://www.thinkauto.com/acatalog/On_line_shop_Holley_328.html

[Bshaunessy]

Hey no Saurman
   I replaced my leaky OEM pump with a non OEM pump from Buds Benz ($725 usd).  Fits perfect, quieter than OEM   and still working well after a year.
https://www.budsbenz.com/catalog/230-250-280-sl/d-fuel/D205-010

Waiting on rebuild kit ( Q? Authentic Classics?) and will rebuild original fuel pump as a spare….winter project

[roymil]

For a temporary pump, while I worked on my short pump rebuild, I also installed a Carter P4601HP, just like Tycoon in the earlier post.  I agree with Tycoon that it is cheap and does work but it is loud and has an inconsistent noise, because its speed doesn't sound constant.   I've have also only been measuring ~11psi, sometimes lower with low rpm and lower voltage from alternator.   My theory is that the Carter pump needs a regulator or return flow constrictor to get the pressure up near 15psi where it should be, regardless of voltage.   Once I sort that out i'll reinstall the original pump and keep the Carter as a spare...which will undoubtedly be needed at some point.    I'm going to try leaving the regulator in with the original pump an see if that stabilizes pressure better.

[stickandrudderman]

Link modified.

[David Robinson]

I fitted "Hi OTP017 Out-Tank Fuel Pump o/e:- 0580464070" with a hi flow pre filter when mine failed 2 years ago. Still fitted and works fine. A little loud when stationary or low revs. But both together only cost around €110.

[jim 56]

I really doubt magnets are no good. Yes check impellar is not upside down. I think if I remember correctly that if you put the can on with the magnets 180 degrees out it will run backwards. Yes Baron does do short pumps the man knows soooo much about them very friendly called him years ago and really helped me.

[Pinder]

If you got the magnets 180 degrees out try switch Plus and Minus. it should run the opposite direction and see if you get flow.  Ive never seen a magnet lose strength.

[franjo_66]

Hi Stick

I found these specs for the Holley, seems like max pressure of 7psi is not sufficient for our cars?

Free Flow Rate                       97 gph
Maximum Pressure (psi)       7 psi
Inlet Size                              3/8 in. NPT
Inlet Quantity                      Single
Inlet Attachment              Female threads
Outlet Size                      3/8 in. NPT
Outlet Quantity                      Single
Outlet Attachment              Female threads

[stickandrudderman]

There's several different versions, one of which generates 14psi.

[stickandrudderman]

It's a nice neat install.
However, the pump is pretty noisy even if rubber mounted and this one failed after only a fuel miles.
Back to the drawing board!

[Ed Riefstahl]

Very interesting topic to many of us i think.

In the 65,000 miles of driving my SL and many trips cross country, coast to coast etc, one of the only times I've had the car just stop running was 1/2 mile from home. It was the fuel pump. A small grain of grit got between the impeller and bottom plate.

It was an easy fix, but would have been a major problem in the middle of Nevada somewhere.

We are seriously considering another cross country adventure in Ms Magoo,, so an aftermarket spare pump would sure give a guy some peace of mind, if I knew it would actually work. 

Ed Riefstahl
Erie, PA

[BaronYoungman]

I am back...yes I still do short pumps. I will try and stay more current. Missed everyone, I am here now.
Bob
BaronYoungman

[stickandrudderman]

I modified my post above...

[ctaylor738]

Here is a solution, a bracket for a 124 and a 380 fuel pump.

Cheers,

CT

[stickandrudderman]

Yes that's a common solution but believe it or not the most difficult part of that conversion is sourcing the hangers!

[Manila Karl]

I had the same problem with the short pump. If you don't have a show car, try a aftermarket inline high pressure fuel pump.
These things go up to 5 bar (which is normally far to much, but you have the regulator in the line near the IP.
And trust me, you'll be surprised how well you car starts when its cold because the CSV sprays real nice...