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Rochester choke tube fitting

what size is it

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#1 _abtorana_

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Posted 12 February 2014 - 08:46 PM

hello all

I need to make a new tube for the auto choke on a Rochester 4bbl

 

what is the nut size I need to connect pipe to choke at carburettor

 

hope someone can help

 

thanks in advance



#2 hanra

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Posted 12 February 2014 - 08:55 PM

Do you mean where it connects to the bi-metalic spring housing on the manifold?

33754925-F473-4123-B294-31A1FF4D30AC_zps

#3 yel327

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Posted 13 February 2014 - 12:13 PM

Are we talking HQ or HJ style like Hanra shows above or HX onwards?



#4 _abtorana_

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Posted 13 February 2014 - 08:03 PM

thanks for replies

 

have included a pic

 

its a blue motor Rochester,i just need the nut I can source some copper tube hopefully is it 5/16 ??

 

thanks

 

sorry bout the huge picture

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#5 hanra

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Posted 13 February 2014 - 08:26 PM

I might still have a spare.

#6 Dr Terry

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Posted 14 February 2014 - 07:30 AM

I'm guessing 3/8" UNF.

 

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#7 yel327

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Posted 14 February 2014 - 09:05 AM

http://www.ebay.com....1#ht_418wt_1153

 

Or maybe ask this guy if he'll sell you one:

 

http://www.ebay.com....2#ht_264wt_1153



#8 _abtorana_

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Posted 14 February 2014 - 07:37 PM

ok will have a look,

 

I have an old two barrel auto choke, so I could take to a bolt shop or similar to see whats available.

 

thanks for the replies



#9 yel327

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Posted 14 February 2014 - 07:52 PM

I just bought a whole setup off the guy in the second link above off Ebay, for my 1974 HJ Premier. Not sure if he does ADR27A stuff though







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