I have some carbs with PD46A C (in a rectangle) PHJ stamped on them. Throttle cables aren't connected. When I open them, they don't snap shut, just slowly ease shut.
Odly, I can't work out where the return spring should be (as I thought I could clean it replace it). Should it be next to the carb 4 ..I have what looks like a mounting there, next to the tickover adjustment, but there isn't a spring..
I looked in the Haynes manual but the diagram isn't clear in terms of location.