Carbs help - Solex 32/34 Z2

Gaverick · 14 Aug 2014 at 19:29

Having grown up in an age of fuel injection I now find myself with a carburated car (Peugeot 205 XS). This carb is in need of a rebuild badly so I started to strip it down last night. Apart from being a bit dirty I noticed that one of the emulsion tubes has a check ball in the end and this ball appears to be stuck solid, I couldn't get it to move at all.

I'm wondering if this ball should be able to move freely, my guess is yes it should but I'd like it if someone could confirm before I go about trying to free it off.

Spares for this carb are hard to get a hold of, I've managed to find gaskets though.

The part I'm talking about;

Thanks in advance.

Orionaut · 14 Aug 2014 at 20:40

IIRC, Leave the ball alone!

leigh_boy · 15 Aug 2014 at 07:59

idle jet, dont try and remove it. also dont clean the jets with anything abrasive

Dogbreath · 15 Aug 2014 at 12:13

The ball should not move, it's sealing the end of the emulsion tube.

Gaverick · 15 Aug 2014 at 17:48

Thanks for that. Rebuilt the carb with the ball stuck in the end and all works fine so it's obviously meant to be like that. How does the fuel get in the emulsion tube if it's sealed?

Janesy B · 15 Aug 2014 at 17:59

Drawn in from the holes in the tube?

leigh_boy · 15 Aug 2014 at 21:50

Janesy B said:
Drawn in from the holes in the tube?

that would make sense

Orionaut · 15 Aug 2014 at 22:29

Gaverick said:
Thanks for that. Rebuilt the carb with the ball stuck in the end and all works fine so it's obviously meant to be like that. How does the fuel get in the emulsion tube if it's sealed?

Fuel doesn't get into the emulsion tube! Air does!

(The purpose of the emulsion tube is to compensate for the fact that air is compressible and fuel isn't, the emulsion tube provides a mechanism for weakening the A/F mix at higher airflows to prevent it from becoming over rich)

Gaverick · 15 Aug 2014 at 22:36

Ah makes sense. What's with the other tube being open at the bottom then?

jumpy · 16 Aug 2014 at 01:28

According to my haynes carburettor manual for the Z2 -
the two perforated tubes are the primary and secondary venturi combined air corrector jets with emulsion tubes.
The curved copper tube is the pump injector.

Not sure about the tube on the rhs of you photo - hard to tell from the diagram without getting a hands on look at it.