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Discussion Starter · #1 · (Edited)
Hi

I have Holley 600 carb that is flooding on idle. I think float level may need adjusting but on all info I looked at it talks about a sight plug and a float level adjustment screw. My carb has plastic floats and no sight plugs or adjusters that I can see. Can anyone help with settings please?
 

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Your 600 will be the basic carb with no adjustment screws externally but you remove the float chambers and adjust by moving the float arms internally. Take the carb list number from the top front of the air horn and use Google to get your height figure.
Under normal circumstances the adjustment does not move and it's more likely that you have a bit of shit on the needle valve so clean those out as well.

http://www.holley.com/data/TechService/Technical/Adjusting Your Carburetor.pdf
 

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Hi,had simlar problems turned out to be dirt,had one of those shiny filters but they only stop half bricks,get it clean an fit a quality filter....cheers DAVE
 
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