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Jim Derrig

My WAG is that you’ve flipped the relationship between the gaskets and the diaphragms on the carb.  The gaskets go on the bottom (closer to the ground when carb is installed) and the diaphragms go on top.  If that’s not it, there could be an air leak, such as from a bad mixture screw gasket.

Once you’re convinced that the fuel path is rock solid, the next culprit is a weak spark from a bad stator (though my experience is with Leopards and not PRD’s)