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08-03-2018, 12:23 PM | #1 |
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Model B carburetor
What is the standard float level setting for a Zenith model B carburetor.
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08-03-2018, 12:46 PM | #2 |
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Re: Model B carburetor
5/8" below the top of the lower housing. Get one of the level check tube from a reliable source. Renner's Corner has a good one and worth the money.
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08-03-2018, 05:53 PM | #3 |
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Re: Model B carburetor
I have the tube. I have found conflicting float setting specifications although I would think it is the same as the Zenith A carb. Anyone else out there with different specs other then 5/8's. Daren
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08-04-2018, 07:15 PM | #4 |
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Re: Model B carburetor
I have found the best setting to be where the seam joining the upper/lower halves of the float is parallel with the casting edge.
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08-05-2018, 10:23 PM | #5 | |
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Re: Model B carburetor
Quote:
Bill W.
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08-05-2018, 11:34 PM | #6 |
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Re: Model B carburetor
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08-06-2018, 12:31 PM | #7 |
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Re: Model B carburetor
The baffels in the lower housing were to help reduce gas sloshing when coming to a stop . Gas sloshing in the bowl of the carb can cause stalling when coming to a stop .
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08-06-2018, 01:27 PM | #8 |
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Re: Model B carburetor
I don't think the baffles would apply to the B carb as the float hinges north-south vs east-west.
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08-06-2018, 02:13 PM | #9 |
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Re: Model B carburetor
The float does hinge differently in the B carb but sloshing fuel in the bowl can cause stalling . I've had to go back and tweak the float setting on mine . The B carbs didn't stall as badly as the model A Zenith carb . Why else would you think that baffels were added to the model B carb ? When my B carbs have stalled , slightly lowering the level of the float has solved the problem .
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08-07-2018, 12:44 PM | #10 |
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Re: Model B carburetor
I have had two B carbs and neither had the baffles. I have not had stalling problems with either one. Did the B carbs leave the factory with baffles or is this a aftermarket thing.
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08-07-2018, 01:54 PM | #11 |
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Re: Model B carburetor
I was under the impression the baffles had to do with inlet fuel pressure.?
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08-07-2018, 05:42 PM | #12 |
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Re: Model B carburetor
To confirm the suggested fuel level I referred to the June 1932 Service Bulletins where there is coverage of the 1932 4 cylinder car carburetor and fuel level is clearly 5/8 inch as others have said.
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08-07-2018, 10:10 PM | #13 |
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Re: Model B carburetor
Thanks. Daren
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08-08-2018, 08:23 AM | #14 | |
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Re: Model B carburetor
Quote:
FWIW I have run dual B carbs with no baffles or springs, with 2 psi fuel pressure. No problems with stalling or leakage. |
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08-08-2018, 11:21 AM | #15 |
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Re: Model B carburetor
I run dual updraft model B carbs on two of my model A's with good results . If the baffles are not to help control sloshing , what is their purpose ?
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08-08-2018, 12:43 PM | #16 |
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Re: Model B carburetor
Hi Purdy,
From what I remember reading they are used if you have a mechanic fuel pump, they deflect the pressure pulses away from the float, I suppose without it, it could cause the float to lift of the needle and seat. Regards Brian.
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08-08-2018, 08:18 PM | #17 |
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Re: Model B carburetor
According to my Rex Reheis carburetor book, the baffle reduces fuel sloshing during cornering.
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08-08-2018, 09:42 PM | #18 |
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Re: Model B carburetor
Sparky , thanks for posting . I've got the Rex book and thought that I remembered that . I was mostly thinking about stalling at stops . Sloshing when cornering will efect the B carb more . Rex Reheis Was the model A & B carburetor man .
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08-08-2018, 09:45 PM | #19 |
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Re: Model B carburetor
Brian T . Thanks for your reply .
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04-08-2019, 09:11 AM | #20 | |
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Re: Model B carburetor
Quote:
Would you set it for 6/8 or 7/8 below the seam instead of 5/8? |
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