Originally Posted by neo1piv014
I also noticed that the O-ring that sits on my float assembly - the larger of the two O-rings that goes underneath my float weight - is able to spin almost freely around in it's notch. Probably worn out.
I wouldn't worry about that too much. What I would worry about is if the float cage does not fit snugly in the carb body, i.e. it falls out by itself, and/or requires zero effort to install, or if the o-rings otherwise exhibit evidence of hardening, shrinking, deformation (i.e. no longer having a round cross-section) or cracking.