Hi i Would like to know if someone can verify that there IS a vent hole on no3 carb on the PD46A.According to the pdf there is a vent hole on the left side leading to the float chamber.i have this protruding part but carb 1 and two has it also and there is no sign of air being able to pass thru,also no4 has a similar protrusion but with a brass fitment inside with an apparent hole.these carbs were admittedly badly chocked up but i let carb cleaner sit for ages in the inner/upper float chamber but i dont think there is a vent hole and what would be the possible reason when the brass overflow tube would act like a vent hole? can someone confirm/deny that this protusion IS in fact a vent hole cheers
