Been working on a 1960 Evinrude 10 hp, replaced coils, points, condensers, spark plug wires and fuel lines. New fuel hose and bulb. Started on 3rd pull, runs rough, seems to be burping, adjustiing low and high speed needles does not seem to make a difference. stalls out on low idle and can only restart with choke out. Thought I could get by without carb rebuild. Does this sound like a carb rebuild?