Sorry, I am not too familiar with the dual carb setups, except on a VW.

Is the stumble off idle, or only under load?

In my experience with my Q-jet, an off idle stumble would be fuel related. Are the floats in the carbs set too high? Are the carbs synchronized?


1948 3600 (I think) Sat in the bush for over 30 years until I rescued it.