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ATC200ES Carb Question

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  • 2 weeks later...

4 stroke style carbs have a fuel screw, that is sometimes called an air/fuel screw. You screw it out for more fuel, and in for less.

Usually, if you have to turn it out more than 3 turns from full in, to achieve proper tuning, you need to go one larger size on the pilot jet. Hope this helps.

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