Bis Carb issues

[cider]

Hi All
Our Bis polish carb has an issue  It started when the choke lever/cable wouldn`t return
I found that the cable cover clamping bolt had stripped it threads. So will need  a heli coil
Then I noticed this had came apart



Its some sort of diaphragm With a plunger that belong near the choke


The question is what does it do and where does the plunger connect to
Has anyone got a picture of a complete carb Please

Thank you
Pete

[cider]

Hi All
As I have removed the carb I thought I`ll have ago refitting the broken/missing choke
activator
first remove the butterfly valves, then the shaft and if its still there the small brass end disc
remove the diaphragm/plunger on the side of the carb
make sure the choke activator is the correct way around "same as picture"
Then its a matter of sliding the activator up and pushing the butterfly valve shaft though




I have cleaned and repaired the diaphragm "seems it just a push fit with a few punch marks holding
it at together

All done and screwed back on the carb "still not sure what it does

Cheers
Pete

[cider]

Hi All
Carb back on the car and running a treat Now just waiting for the next bit to give up or fall off

[jokke]

the diagram is for faster idle when the cooling fan kicks in.

[poxxxy]

Hi Cider,

I had to replace that choke mechanism for the butterfly valves to... Although I did have the car running great without it in the end lol.

I managed to source the whole assembly from a seller on Polish Allegro (but thats the only place in the world I managed to! lol).

I'm still wondering exactly how to setup this carb... perhaps I'll figure it out one day lol.

[cider]

Hi
I think the choke parts where listed in fiat cinquecento 700 section on the polish allegro
 our local fiat dealer was not helpful But a member on here point us in the right direction
We didn`t need to tune it sorry
Good luck on your quest

[poxxxy]

I've got it running great finally lol. Turns out that choke butterfly mechanism had became disconnected between fitting the carb and starting the car after rebuilding it. Doh! Fires up first turn of the key now perfect .