The Ford Barn

Mike's Dream · 03-13-2025, 07:19 PM

Hello all, before I put my Nellie ('31 Model A Tudor) away for the winter I had developed a gas leak where the gas line connects to the coupling to run a Model B carburetor (which came on the car). So over the winter I replaced the brass couplings I purchased from Snyder's. Today I decided to re-mount the carburetor and try to fire up old Nellie, but now I had a bad drip from the drain plug, so I tried to tighten it with no luck and again I took the carburetor off and this time discovered the reason I couldn't tighten the drain plug was that the threads in the carb body had worn and the drain plug wasn't long enough to grab any of the threads further up the body. My first question is can I use a longer bolt say a 3/8" x 24 x 1/2" or will I fowl something up inside the lower body?? My second question is can some one recommend where I could purchase a quality rebuilt model B or any reliable carburetor in case mine can no longer be used. I truly appreciate any information or guidance.

Gary WA · 03-13-2025, 07:50 PM

Welcome to the Ford Barn. Yes you can and put a nylon/fiber washer on it. You can retap to next size

mercman from oz · 03-13-2025, 10:00 PM

ronn · 03-14-2025, 07:11 AM

try Berts in CO for a rebuilt.

Chuck Dempsey · 03-14-2025, 07:14 AM

Welcome to the 'Barn!

kurt v · 03-14-2025, 10:03 AM

Sponsored Links (Register now to hide all advertisements)

Renners corner early ford parts, all he does is B stuff

1930artdeco · 03-14-2025, 10:06 AM

Welcome to the Barn! Also, with a Model B carb (it will work) but to get the most out of the carbs power you will need to either:

1) bore out an A manifold to match the throat of the carb
2) get a Model B manifold. The downside to this is that now all of the adjustment rods will be out of alignment.

Do this and that engine will wake right up!

Mike

Bruce of MN · 03-14-2025, 01:22 PM

Do any of the vendors sell Model B carbs? The Renner's and Bert's sites don't list them.

J Franklin · 03-14-2025, 02:16 PM

Listing parts for sale and selling parts are 2 different things. You need to ask to get.

RENNERS CORNER · 03-18-2025, 01:54 AM

You might try a new plug, some have longer and better threads than others.
You can also make a new oversized plug using the strainer plug and gasket from a model A Zenith carburetor. This will require retaping the existing drain plug hole. You must not interfere with or obstruct the holes entering and exiting that area. Another idea is to find a good used lower half, sometimes they can be found on eBay. One with a broken ear is a good candidate. The lower halves are interchangeable.

Also I don't follow how the 3 brass adapter fittings were the cause of your original leak?
I can guess that the tube nut and ferrule could be an issue but how where the adapter fittings an issue? They use pipe threads at 2 of the joints and a taper into the carb.

03-13-2025, 07:19 PM	#1
Mike's Dream Junior Member Join Date: Aug 2013 Location: Fair Lawn, New Jersey Posts: 1	First Time Poster Hello all, before I put my Nellie ('31 Model A Tudor) away for the winter I had developed a gas leak where the gas line connects to the coupling to run a Model B carburetor (which came on the car). So over the winter I replaced the brass couplings I purchased from Snyder's. Today I decided to re-mount the carburetor and try to fire up old Nellie, but now I had a bad drip from the drain plug, so I tried to tighten it with no luck and again I took the carburetor off and this time discovered the reason I couldn't tighten the drain plug was that the threads in the carb body had worn and the drain plug wasn't long enough to grab any of the threads further up the body. My first question is can I use a longer bolt say a 3/8" x 24 x 1/2" or will I fowl something up inside the lower body?? My second question is can some one recommend where I could purchase a quality rebuilt model B or any reliable carburetor in case mine can no longer be used. I truly appreciate any information or guidance.

03-13-2025, 10:00 PM	#3
mercman from oz Senior Member Join Date: May 2012 Location: Queensland, Australia Posts: 12,013	Re: First Time Poster

03-14-2025, 07:11 AM	#4
ronn Senior Member Join Date: Feb 2011 Location: NNNNNNNNJJJJJJJJJJ Posts: 7,648	Re: First Time Poster try Berts in CO for a rebuilt.

03-14-2025, 07:14 AM	#5
Chuck Dempsey Senior Member Join Date: May 2010 Location: Waynesville, NC Posts: 964	Re: First Time Poster Welcome to the 'Barn!

03-14-2025, 10:03 AM	#6
kurt v Senior Member Join Date: Sep 2021 Location: summerton, sc Posts: 486	Re: First Time Poster Sponsored Links (Register now to hide all advertisements) Renners corner early ford parts, all he does is B stuff

03-14-2025, 10:06 AM	#7
1930artdeco Senior Member Join Date: May 2010 Location: Lynden, Wa Posts: 3,777	Re: First Time Poster Welcome to the Barn! Also, with a Model B carb (it will work) but to get the most out of the carbs power you will need to either: 1) bore out an A manifold to match the throat of the carb 2) get a Model B manifold. The downside to this is that now all of the adjustment rods will be out of alignment. Do this and that engine will wake right up! Mike __________________ 1930 TownSedan (Briggs) 1957 Country Sedan

03-14-2025, 01:22 PM	#8
Bruce of MN Senior Member Join Date: May 2010 Location: VA Posts: 1,808	Re: First Time Poster Do any of the vendors sell Model B carbs? The Renner's and Bert's sites don't list them.

03-14-2025, 02:16 PM	#9
J Franklin Senior Member Join Date: May 2010 Location: Oregon Posts: 6,370	Re: First Time Poster Listing parts for sale and selling parts are 2 different things. You need to ask to get.

03-18-2025, 01:54 AM	#10
RENNERS CORNER Member Join Date: Feb 2013 Location: MICHIGAN Posts: 47	Re: First Time Poster You might try a new plug, some have longer and better threads than others. You can also make a new oversized plug using the strainer plug and gasket from a model A Zenith carburetor. This will require retaping the existing drain plug hole. You must not interfere with or obstruct the holes entering and exiting that area. Another idea is to find a good used lower half, sometimes they can be found on eBay. One with a broken ear is a good candidate. The lower halves are interchangeable. Also I don't follow how the 3 brass adapter fittings were the cause of your original leak? I can guess that the tube nut and ferrule could be an issue but how where the adapter fittings an issue? They use pipe threads at 2 of the joints and a taper into the carb.