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Old 11-09-2011, 12:41 AM
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need help ,rochester dualjet

i am jus trying to figure out . which needle is which? i am trying to adjust for mixture .there is a drivers side one and a passenger side one bottom side of carb in front. oh yes and how many turns to adjust each? any help would be hella great. its not the electrical carb either all mechanical

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Old 11-09-2011, 01:08 AM
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The two screws on the bottom front of the carb is the idle mixture adjustment. No carb has a "set amount" for them. They are set with a vacuum gauge. When the gauge has it`s highest vacuum reading it`s correct.
Afterwards you`ll want to set both sides equally. Do this by turning it in and count the amount of turns until it seats lightly. If you seat it tight it can do damage. Then turn it back out the same amount then follow on the other side. If you don`t have a vacuum gauge then set them to where the engine idles the highest by tachometer and runs the smoothest, if no tach, do so by ear. Turning them in leans the mixture. Turning them out richens the mixture.
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Old 11-29-2011, 06:00 PM
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thanx , that is very helpful . i was kinda on the rght track but wantd to ask for advice.... gracias amigo
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