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Quadrajet 4MV help needed.

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Old Feb 17, 2012 | 08:41 AM
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Default Quadrajet 4MV help needed.

I am rebuilding the carb on my '74 4 speed. I can't find info on the part number on it. 7045626. I'm not sure if this is the original carb. I need to know the float level height. Thanks!
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Old Feb 17, 2012 | 10:58 AM
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Your rebuild kit should tell you the float setting.

This is good.


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Old Feb 17, 2012 | 11:05 AM
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Nope. 7045626 is not listed on it.
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Old Feb 17, 2012 | 11:31 AM
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Can't find any info on your carb but my 74 has a 7044207 and the float is set to .375"
You might start there.
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Old Feb 17, 2012 | 11:34 AM
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Thanks. I appreciate you taking the time to look that up. I had a feeling it was 3/8's. I set it to .250 and it ran like poop and smoked. Thanks again. Tom
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Old Feb 17, 2012 | 11:46 AM
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If you're doing any kind of work on Q-Jets, the mentioned Doug Roe book's a good one. Can also contact Q-Jet guru Lars Grimsrud v8fastcars@msn.com. If anyone can help, he's the guy.
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Old Feb 17, 2012 | 11:54 AM
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This is not the original carb, it's from a '75 Chev of some sort with auto trans.
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Old Feb 17, 2012 | 11:59 AM
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Originally Posted by thomasanonymous
I am rebuilding the carb on my '74 4 speed. I can't find info on the part number on it. 7045626. I'm not sure if this is the original carb. I need to know the float level height. Thanks!
Are you sure the '626' isn't '526'? If so, it's a 1975, California, Chevy, with auto.

Last edited by Mashman; Feb 17, 2012 at 12:02 PM.
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Old Feb 17, 2012 | 12:03 PM
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Thanks guys.
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