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1904 carburetors

 
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Old 06-03-2019, 07:15 PM
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1904 carburetors

I'm curious about Holley 1904 carburetors. I found a reconditioned one on Ebay. It looks like almost any other 1904, but the seller says it's for an automatic transmission. Outwardly, it doesn't look different from any other 1904. Was there something special done to these carbs for automatics? I've had the same 1904 on my '53 f-100 since I got it in 1975. I'd always assumed it was the carb that came with the truck. It has a thing on the side ( a breather of some sort?) that isn't shown in the 1953 service manual. Any ideas what it is?
 
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Old 06-03-2019, 09:47 PM
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I think the part you have circled is called a spark arrestor. It is included on 1904 carbs going into vehicles equipped with automatic transmissions.

Jim
 
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Old 06-03-2019, 11:04 PM
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That is a spark control valve, See below

 
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Old 06-04-2019, 11:17 AM
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So it looks like my carburetor isn't the original that came with the truck...I'm assuming that this spark arrestor doesn't have much of an impact while I'm using it with a standard transmission. It's been part of the truck for at least 45 years.
 
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Old 06-04-2019, 04:27 PM
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I think 53 was the first year for the spark control valve.
 
 


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