Accelerator pump diaphragm

[rjcruz27]

My accelerator pump diaphragm is leaking and I don’t feel confident with my skills to rebuild the whole carburetor. Can I just get that seal and replace it? Does anyone know which seal I would get?

1974 bronco explorer

 

[Slowleak]

You can get just the diaphragm. Most parts stores have them for about $5.00. Tell them you need a accelerator pump diaphragm for a Motorcraft 2150.

https://shop.advanceautoparts.com/p...14301-P?searchTerm=Accelerator+pump+diaphragm

 

[WheelHorse]

I would be confident that you could rebuild it.

They are a very simple carburetor.

 

[rdullery76]

I just replaced the accelerator pump diaphram on my 76 with Motorcraft 2150 carburetor. Very easy to do. You do not need to remove the carb or even undo the linkage. Inside the pump assy, you'll find the parts shown in Slowleak's internet link, and a spring. The spring is tapered. When you reassemble, make sure the large diameter end of the spring goes against the carb body. Might also check the condition of the red rubber plug (check valve) whilst in there. That acts as the valve between the float bowl and the accelerator pump circuit. If necessary, I believe it too can be purchased separately. Here is an online source for the check valve: https://www.carburetor-parts.com/Motorcraft-2150-Umbrella-Type-Check-Valve_p_1384.html

All the above is valid for a motorcraft 2150. If yours is a different carb, buy the parts for your carb.

Easy to do.

 

[B RON CO]

Hi, I always changed the rubber valve too, but you have to remove the top of the carb, and then you will need that gasket.
All I really want to say is don't overtighten the screws, gently snug them down.
Good luck

 

[Rdtrip]

I just replaced the accelerator pump diaphram on my 76 with Motorcraft 2150 carburetor. Very easy to do. You do not need to remove the carb or even undo the linkage. Inside the pump assy, you'll find the parts shown in Slowleak's internet link, and a spring. The spring is tapered. When you reassemble, make sure the large diameter end of the spring goes against the carb body. Might also check the condition of the red rubber plug (check valve) whilst in there. That acts as the valve between the float bowl and the accelerator pump circuit. If necessary, I believe it too can be purchased separately. Here is an online source for the check valve: https://www.carburetor-parts.com/Motorcraft-2150-Umbrella-Type-Check-Valve_p_1384.html

All the above is valid for a motorcraft 2150. If yours is a different carb, buy the parts for your carb.

Easy to do.

Silly question but I thought the SMALL end of the spring for the accelerator pump goes towards the carb body? Atleast on this 1 bbl from 66 I'm currently rebuilding. Even the instructions show the small end to the body, large end at the accelerator pump.

 

[Slowleak]

On a 2150 the large end is next to the carb. If you reverse it, it will be pressing on the check valve which the large end fits around.