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Just under the air filter, cab side, you'll find two adjusting screws. One (A) "flat-head" screw, next to the throttle cables, and one (B)"4 way" screw used for the idle mixture. The first one (A) adjusts the idle speed, clockwise to hasten, counter-clockwise to lower. The second one (B), is the mixture screw. Clockwise enrichens the idle fuel mixture, and increases the idle. Take your time and adjust both screws for maximum performance. Also, check to see if there is a sight-glass on your carburetor, and notice how well your float works.

Off idle tuning is controlled by the computer and is not adjustable.

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โˆ™ 2009-09-27 05:40:47
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Q: How to adjust the carburetor for 1990 Mazda B2200?
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