Holy rattling carburettors, Batman!

[neil3965]

I have taken apart a carburettor to give it a thorough cleaning (32-34 PDSIT from a 1982 CU 2.0L Aircooled engine).

I've removed everything removable from the main, centre part of the carb body (base of float chamber and venturi), but when I shake it, it rattles! There is something loose inside one of the inaccessible chambers or channels within the carb body. I know there is a tube hidden beneath the non-removable air jet - ie, the one marked by the central red arrow in this photo -



Sounds like that is where the rattle is coming from.

So... is this normal? Is there a hidden part that rattles when you shake? Or is there something rattling around in there that shouldn't be there?

[steve8090]

Yes it should be there except its under your orange arrow, it is a little ball bearing designed to create pressure on the accelerator jet, acts like a one way valve, I hope you have marked all of those jets for respective place.

[neil3965]

Many thanks Steve!

(Yes, everything marked!)