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Old 03-06-2013, 06:01 PM   #1
JFetter
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How to adjust choke pull-off on Holley style Summit carb?

I have a Summit SUM-M08600VS that is acting up. Quite often when starting, it will not start at all. (unless I depress the pedal and hold it that way)

I suspect it is flooding, and think that it's due to lack of air.

Here's my carb:
http://www.summitracing.com/parts/sum-m08600vs

I've read that it's just a holley knockoff.


I have reset the electric choke housing to the 'factory' condition (index marker), but as I understand it, this shouldn't matter anyway. This is a problem during initial startup.

Some old holley guides talk about using a bent paper clip to adjust the "Choke Qualifying adjustment", but I don't think that applies to my carb?? Pic attached.



I'm suspecting vacuum leak or adjustment problem.

Am I on the right track here?

Is there an easy way to check the choke pull-off operation without the engine running? I.E pulling off one of the vacuum hoses and attaching to a vacuum tool?

I'm very new to carbs and sort of learning on my own here.

Thanks!
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Old 03-06-2013, 09:14 PM   #2
geezer#99
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Re: How to adjust choke pull-off on Holley style Summit carb?

When you finally get it running, where is the level of the gas in the site glass?
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Old 03-07-2013, 05:46 AM   #3
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Re: How to adjust choke pull-off on Holley style Summit carb?

About 1/2 full.
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Old 03-07-2013, 09:22 AM   #4
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Re: How to adjust choke pull-off on Holley style Summit carb?

Lower the fuel level to 1/4 of the sight glass on both bowls. Might stop your flooding and starting problem.
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Old 03-07-2013, 01:24 PM   #5
JFetter
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Re: How to adjust choke pull-off on Holley style Summit carb?

Ok thanks! I'll give that a try.
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