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Choke Adjustment

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Old Apr 21, 2012 | 05:41 PM
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Default Choke Adjustment

To all you carb gurus out there. Quick question: When the choke closes before a cold start should the butterfly be closed all the way or should there be a small air gap between the butterfly and the air horn?
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Old Apr 21, 2012 | 06:03 PM
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small gap. if it closed you would stall, no air.
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Old Apr 21, 2012 | 06:41 PM
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the pulloff should open it roughly 1/4 inch
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Old Apr 21, 2012 | 07:22 PM
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Ok now I'm getting the idea. Thanks both of you for the info. If I understand correctly the choke is closed until the engine starts and the the pull off will open it enough to allow air into the system..
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Old Apr 21, 2012 | 07:39 PM
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When you steo on the gas to set the choke before a cold start, the choke flap should be fully closed. Once the engine starts, and begins producing vacuum, the choke pulloff opens the choke flap a little bit. The choke flap opens as the engine warms up from there.


Keep the shiny side up!
Scott
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Old Apr 21, 2012 | 08:43 PM
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Wow...what a difference. Adjusted the choke so that it just closes when cold and adjusted the pull off so that after the engine starts the choke plate opens about 1/4 of and inch. Runs great, tomorrow morning will be the true test. Thanks Guys
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Old Apr 21, 2012 | 09:50 PM
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I've adjusted ALL my chokes like that. It's not like we drive in real cold weather and need long warmups.
I also turned down the fast idles.
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