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AMT 626 dies on acceleration

Just picked up a 1992 AMT 626 with the fe290d motor. Idles well, but dies at about 3/4 throttle. Put on a new correct carb and the problem did not go away. New spark plug and fuel pump is pumping fuel.

Have to choke it to start.

I have checked for vacuum leaks around the carb. Adjusting the air fuel screw does not affect the issue.

It acts as though it is running out of fuel, so I put a separate fuel tank above the carb and ran the hose directly to the carb. No change.

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