[T Bird]

Allen
Here's the procedure out of the factory workshop manual:
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1. Turn the self-locking adjusting screws ("a" shown in picture) at the pump shaft lever until the 3 actuating fingers on the pump shaft are positioned vertically (straight up and down).

2. Loosen adjusting screws ("b" shown in picure) on the actuating fingers.
CAUTION- To prevent inaccurate readings, do not adjust the injection quantity while the engine is hot.

3. Turn in adjusting screws of accelerator pumps for cylinders #1 and # 4 until they lightly touch the pump plungers. Tighten lock nuts.

4. Check discharge quantity in cylinders #1 and #4 with measuring tube P 25a. Nominal quantity is 0.5 +/- 0.1 cc per stroke. Activate lever once or twice before taking measurement. If the discharge quantity is too high, turn the adjusting screws on the actuating fingers farther in. Adjust as necessary.

5. Adjust the other accelerator pump screws as described above in paragraph no. 3. Recheck discharge quantity and correct if necessary.
NOTE- Fuel should flow from the injection tube as soon as the accelerator pump is actuated. If fuel does not flow immediately, the pump inlet valve may be defective.
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The factory workshop manual pages relating to these Zeniths (SF 46-SF 68) cover the following: description of operation of each circuit with schematics; carb specs; procedures for adjusting idle speed, auxiliary enrichment system, accelerator pumps, and float level; removing and installing carbs; an exploded diagram of carbs with numbered description of each part; and, how to check the micro switch.

If you want copies of these pages, send me a private message with your fax # and/or address and I will fax and/or mail to you.

Frankly, after reviewing this material, it's no wonder many of these Zeniths have been junked in favor of Webers!