Mike's carburetor isn't always correct nor accurate. My opinion is it should be used for general suggestions. Folks here (including me) have posted many times about the Carter YF models. Do you know which model number you have? The answers to your questions are yes...there should be a little needle in hole 1 and there should be 2 springs above the diaphragm lifter link rod on top and one below. Yes, it isn't easy to get it back together...compressing those 2 springs requires a little concentration. Somewhere around here there was supposed to be a report (I and Jon H wrote it) on rebuilding the Carter YF models. I don't know where it went, though.
