Introduction
In this guide, you will be instructed on how to adjust and synchronize the output of the two carburetors.
What you need
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Use a 3/8 socket wrench to loosen the retaining bolts on the air cleaner.
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Rotate the air cleaner so that the throats of both carburetors are clear. Now you will be able to adjust them.
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Start the engine
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Allow time for the engine to warm up completely
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Attach carburetor synchronization tool to one of the carburetors
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Observe the relative reading, and remember it.
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This reading is a measurement of the airflow speed
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Set the synchronization device on the other carburetor.
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Using a Flathead screw-driver, twist the idle speed screw in to raise the flow, and out to lower it.
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Recheck both carburetors and adjust as needed to get the flow as equal as possible.
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Now, the idle mixture screws must be adjusted.
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Turn both screws in, or out an 1/8 or a turn at a time until the fastest idle speed is achieved.
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Finally, raise or lower the idle speed screws until the idle speed is about 550 RPM
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Rotate the aircleaner back to its original position, and re-tighten the 3/8 nuts on the retainers
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