This thread sure reminds me of the struggles I had trying to make a rigid linkage work. It kept me awake at night until the following criteria came to me when designing a solution.
My food for thought on this is specific to multiple rochesters on a Stovebolt and not other applications.
1. The accelerator return spring would ONLY have that function and have NO influence on the carburetors whatsoever.
2. The only pressure on the carbs idle stop screw would come from the internal pump spring and free from influence from an external spring, bolt, or other means. The linkage should lift it just as your finger would with no stress.
Accomplish these goals and it’s a zero maintenance item.
Happy new year bolters
