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Holley 4175 Spreadbore ?

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Old December 3rd, 2011, 07:06 PM
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Holley 4175 Spreadbore ?
Does anyone know what the lever that opens and closes something (that I'm not familiar with) on the primary fuel bowl is used for? See the attached pic
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Old December 3rd, 2011, 07:09 PM
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It appears to be a vent for the bowl similar to what the quadrajet uses.
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Old December 8th, 2011, 07:50 AM
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Is the lever and contraption even needed since the there is already a bowl vent tube (one for pri and secondary bowls) that sticks up on the main body.
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Old December 8th, 2011, 07:59 AM
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Wouldn't be there if not needed!
Those spread-bores were very finicky - don't mess around with it too much!
I got a brandy new one in my storage - don't know which one, though.
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