automatic and Manual thermoquad difference.

Do you have the s carb or the-sa carb? the s only is orginal sa is later engineering change. 48-365 pump jet and housing assy carb 6139 48-370 pump jet and housing assy carb 6138 48-369 pump jet ,housing assy for export carb. 3 different parts might make a difference. 53A-518 pump operating lever assy carb 6139 53A-544 pump operating leverassy carb 6138 . two different parts. In adjustment data pump stroke is 9/16 for carb 6138 and 1/2 for carb 6139, two different settings