Do you not have an electrical connection on the black choke housing, as picture in the first post of this thread?
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To adjust the choke, loosen the three screws that hold that black plastic housing in place. Rotate the housing until the choke place is nearly all the way closed. Then... Try it. Run the engine until warm, and verify the choke plate opens fully. That should happen regardless of the starting point of the choke plate. The adjustment is more for the cold start. The choke plate should open fully when warm regardless.