Low Fuel Economy - Running rich, not sure why

[Water Warrior 2]

Don't know if this would apply to the GZ carb but a mechanic friend told me this years ago. If the float itself is a piece of material that is supposed to float it can sometimes start to absorb gas and result in it starting to sit lower in the float bowl.
Might be worth throwing a new float in there if you can get one without having to acquire a whole carb.