Quadrajet Problem Solving > Quadrajet Parts and Numbers

7026240

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drhach:
Hi everyone, new guy here. I just purchased what is numbered as a 1966 QJ for a Buick. However, I'm confused. It doesn't have the disk. There's no provision for it and the carb number is stamped in to a pad like it would be on the later carbs. It doesn't look like a re-stamp. I would have thought that if it were a later carb, it would be a service replacement (7041304). But that isn't how it's stamped. Could it be that this was produced after 1968 and factory stamped with this earlier number?

I guess my first concern is ordering replacement parts. Also, what should I look for to indicate vintage (if it matters)?

Dan

Kenth:
A service replacement should have 7026240 stamped were the later units are stamped.
Also the date should be stamped at the same pad, four digits, last one the year it was made and the first three is the day that year.
Also, no plant code (two letters) on the service unit.

drhach:
So, a service replacement would have the same number as the original? I thought service replacements got '7041304' stamped on them. Also, the only other stamping I can find is BMA some distance after the 7026240. It is pretty filthy though. Maybe there's something that I missed. I'll clean the pad a little better and see if I can find anything else.

Kenth:
Here is a picture of an original 7026240. On the tag is stamped 7026240 B D6 (Date) and MA.

drhach:
Here's mine. The only other thing is below where the disk would have been are a couple of stamped dots. But there is nothing indicating date. Like I said, I thought that if this was a service replacement, it would have the service replacement carb number. I guess it doesn't matter. I'll try to measure the float fulcrum when I open it. That may give me a better sense of what I'm dealing with.

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