I have an otherwise good running 3t Corona that occasionally fails to restart after a 10 min freeway drive. When this happens the symptoms point to a very rich situation. The most recent time I realized that the float bowl was way overfull. The needle and seat are new and operate smoothly and the height is adjusted a touch low if anything. In my experience a float either floats or has a hole and sinks. Has anyone had a periodically sinking float?