The Ford Barn

gotthard · 07-04-2021, 10:37 AM

Hi everybody

I just broke the idle needle in my model b carburetor and wonder how to change. I am a beginner...

Can i just pull it? Is it a good idea to drill a screw for better halt? Can anybody get me some instructios, please?

greetings from overseas

ursus · 07-04-2021, 11:16 AM

What is broken here is not part of the idle system. It is the power port tube and is a press fit into the casting. You may be able to simply pull it out with a needle-nose pliers. If not, the remaining piece may be removed using a 0.125 inch or 3mm drill bit after being careful to have the bit centered in the tube before drilling it out.

The Model B carburetor will still be functional without the tube but it will be lacking the power jet feature which is a primitive version of the accelerator pump feature found on newer carburetors.

nkaminar · 07-04-2021, 11:32 AM

Another option is to thread the part and insert a screw to pull it out. Try a 4-40 screw but if that does not work some other size.

Bob C · 07-04-2021, 11:35 AM

Check out Vince's site on how to change the tube.
http://www.fordgarage.com/pages/powe...structions.htm

gotthard · 07-04-2021, 12:29 PM

Yes the car still runs, i tried. Thank you yery much for repair advice.

Gene F · 07-04-2021, 12:41 PM

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Who is the guy in Denver with the big shop? Doesn't her specialize in these? I think he even makes the power jet tubes, and I'm not talking about using one from an ink pen other. I hate to say it, but if you start messing with it you may damage it beyond repair. Best to let someone that knows what they are doing.

Joop · 07-04-2021, 12:49 PM

RENNER'S CORNER
EARLY FORD PARTS

PHONE 1-734-428-8424

MANCHESTER, MICHIGAN

B-9595
Description: ZENITH CARBURETOR POWER JET TUBE KIT

Comments: Tools for Removal and replacement with detailed instructions

Application: 1932 - 34 4-cyl Model B

07-04-2021, 11:16 AM	#2
ursus Senior Member Join Date: May 2010 Location: Oregon Posts: 1,374	Re: model b zenith carburetor advice What is broken here is not part of the idle system. It is the power port tube and is a press fit into the casting. You may be able to simply pull it out with a needle-nose pliers. If not, the remaining piece may be removed using a 0.125 inch or 3mm drill bit after being careful to have the bit centered in the tube before drilling it out. The Model B carburetor will still be functional without the tube but it will be lacking the power jet feature which is a primitive version of the accelerator pump feature found on newer carburetors.

07-04-2021, 11:32 AM	#3
nkaminar Senior Member Join Date: Jan 2012 Location: Western North Carolina Posts: 3,898	Re: model b zenith carburetor advice Another option is to thread the part and insert a screw to pull it out. Try a 4-40 screw but if that does not work some other size. __________________ A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past.

07-04-2021, 11:35 AM	#4
Bob C Senior Member Join Date: May 2010 Location: So Cal Posts: 8,741	Re: model b zenith carburetor advice Check out Vince's site on how to change the tube. http://www.fordgarage.com/pages/powe...structions.htm

07-04-2021, 12:29 PM	#5
gotthard Junior Member Join Date: Dec 2012 Location: Switzerland Posts: 16	Re: model b zenith carburetor advice Yes the car still runs, i tried. Thank you yery much for repair advice.

07-04-2021, 12:41 PM	#6
Gene F Senior Member Join Date: Mar 2012 Location: Ohio Posts: 1,958	Re: model b zenith carburetor advice Sponsored Links (Register now to hide all advertisements) Who is the guy in Denver with the big shop? Doesn't her specialize in these? I think he even makes the power jet tubes, and I'm not talking about using one from an ink pen other. I hate to say it, but if you start messing with it you may damage it beyond repair. Best to let someone that knows what they are doing.

07-04-2021, 12:49 PM	#7
Joop Senior Member Join Date: May 2010 Location: Glendale, AZ Posts: 2,950	Re: model b zenith carburetor advice RENNER'S CORNER EARLY FORD PARTS PHONE 1-734-428-8424 MANCHESTER, MICHIGAN B-9595 Description: ZENITH CARBURETOR POWER JET TUBE KIT Comments: Tools for Removal and replacement with detailed instructions Application: 1932 - 34 4-cyl Model B