Has anyone ever changed one of these themselves?  Mine isn't squirting fuel lately - runs & drives fine but makes starting hard when you can't pump gas pedal to enrich air.  I'm wondering if it's something that can be done with the carb on the engine...let me know what you think, thanks!

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Hi Lee. Changing the accelerator pump is easy. If you get the chance do it. On you tube are a lot of videos about it.

Hi Cees!  Thanks for the suggestion, I tried to find videos on Youtube but for my carb they were just analysis of how the circuit worked.  None of them showed you how to actually do the change.  I'll keep looking.


You will have to remove the entire top of the carb from its base to get to the accelerator pump if you will be attempting that 

No idea what your skill level is 

Are you doing this for the first time or experienced ?

If the pump is bad you SB having a noticeable lag when ever you try to accelerate at any given speed - as that is the result 

I do my carb work on the car but I have worked with dual Carter carbs on my Race engine for years 

Which carb do you have on your Cadillac ?

You will need to use special care to be sure the accelerator pump goes back into its sleeve and does not get hung up or kinked while putting the top part of the carb  back on 

The pump has to move freely and is the thing you need to  be looking   for at that point in the reassembly 

I would see and read all you can find on the Internet ( youtube -etc ) on the carb that you have 


Never did more than adjust mixture on carb myself.  Manual doesn't discuss changing the accelerator pump at all.  Opening anything with gaskets makes me uncomfortable because you know they're going to want you to use some sealant plus new gaskets and it's never quite right again.  Car drives fine, but if you look into bowl while pulling rod zero fuel squirts now; always used to.  However, once running it accelerates fine, although I drive it conservatively like a limo - never like a hot rod.  So who knows...

I see it’s a Carter  from the headline 


I will suggest that you have your carb rebuilt by a good carb shop especially if you have a lot of time on the present one 

That will solve you problem and a fresh carb is always a nice thing to improve performance 

If you do not have the hesitation I suggested before the pump SB good ? 


UPDATE:  Regarding the hard start issue with accelerator pump, I found out what the problems were:

1.  Whoever owned the car previously had the carb serviced and whoever did the work did not put a return spring under the accelerator pump.  I added the spring and installed new accelerator pump, but still was not getting fuel for cold starts.  This was because of--

2. After the long winter storage, fuel dried & gum formed around the ball bearing and brass pin which has to move to let fuel squirt into venturis.  I cleaned and put everything back together, now the car starts first try every time, no matter how cold the weather or how long since last start.  

Car starts and runs better now than it ever has in the six years I've owned it - so glad I saved myself a fortune on a new carb or total overhaul.  


Real good looking Ride 

Real nice to see that you  took the time to repaired the carb and got it right 

I just Love black convertible Cadillacs myself 

I had an all black  exterior 62 Convertible  with a natural leather interior ( a favorite combo of mine ) that started my entire passion for early 60’s  air conditioned  convertibles that has never left me 
A/C was optional in 62 convertibles so not that many around then 

Now that you know the carb you should consider examining your spark plug color after a complete tune up and get them burning the perfect —-paper bag - color they should be 

If you remove the carb from its base there is a valley in the front of the intake manifold than when cleaned out has the ability to make the car warm  faster and idle smoother if you have not done than already 

Do clamp all hoses going to the carb  and intake front and back 

I will post a plug chart that will help get the plug color right to be sure your internal cylinder are burning at the correct temperatures and performing at there best 


A while since I did mine but the parts you need SB valuable at your local auto parts store 




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