Rochester quad?

[71CHEVYSHORTBED402]

What's #1 in this image called? I believe this is the felt gasket that sits between the carb and air cleaner. Also, does anyone know a great source for identifying carburetor parts, including the automatic choke? My 71 was replaced by a manual choke, but I'd like to restore it. The 72 has a automatic choke but may not be complete or working. Pics of a complete choke on a truck would be great. I'm assuming the choke system is the same, big or small block. Thank you.

[71 super]

The correct carb for 71-72 is a 4mv quadrajet, 7041218 I think is the proper number. It was a auto choke controlled by a bimetallic spring on manifold, not electric. The electric choke came later 76-78 range. The carbs are a little different big block and small, it is based in the lower base plate. The small block carb should have kick down arm while big block will not have the arm.

[geezer#99]

Try here. Some good pics or diagrams for your choke.
http://www.carburetor-blog.com/free-...epair-manuals/

[71CHEVYSHORTBED402]

Originally Posted by 71 super

The correct carb for 71-72 is a 4mv quadrajet, 7041218 I think is the proper number. It was a auto choke controlled by a bimetallic spring on manifold, not electric. The electric choke came later 76-78 range. The carbs are a little different big block and small, it is based in the lower base plate. The small block carb should have kick down arm while big block will not have the arm.

The spring must be why the choke on the 72 isn't working. It has a replacement manifold and no sign of a spring I believe the numbers vary. Unless the carb. was replaced prior to 1989, the carb. on the 71 is original. As for the 72 I couldn't tell you. The numbers are:

1971: 7041209
1972: 7042206

Thank you for the response.

[71CHEVYSHORTBED402]

Originally Posted by geezer#99

Try here. Some good pics or diagrams for your choke.
http://www.carburetor-blog.com/free-...epair-manuals/

Thanks. Seem to show everything but the gasket. Looks like it's simply an air cleaner gasket.

Found this pic of a 402 with choke, in case anyone else is interested:

[LockDoc]

Originally Posted by 71CHEVYSHORTBED402

Thanks. Seem to show everything but the gasket. Looks like it's simply an air cleaner gasket.

Found this pic of a 402 with choke, in case anyone else is interested:

The spring fits inside of the metal housing on the intake. There are a few listed on e-Bay. Everyone lists them as Corvette springs, I guess they think they will get more for them that way....

http://www.ebay.com/sch/i.html?_from...pring&_sacat=0

I think you adjust them by bending the rod that connects them to the choke lever.

LockDoc

[kwmech]

Air horn gasket

[ARC190]

You can buy the replacement spring at a parts store. I just replaced mine about 3 years ago and remember it being pretty cheap.
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[71CHEVYSHORTBED402]

Originally Posted by kwmech

Air horn gasket

At first glance I thought so too, but I'm not so sure: http://quadrajetparts.com/quadrajet-...128_25_39.html

Correct me if I'm wrong, but it looks like the spring mounts to the manifold using one screw. There are two holes in the manifold. One may be for a pin on the bottom of the housing cover.