What to look for in a Weber 40 Carburetor

This set of IDTP Weber 40 Carburetors is in for a total restoration. But the job starts with the inspection.
By checking out the parts as they come apart (or not), you will have a better understanding of what is needed in the restoration. Most carburetors can be saved, but if they are worn beyond repair, have snapped-off parts, or have heavy corrosion, they can not be repaired.
This set has lots of bad small parts, but the carburetor bodies are sound.
Thanks for watching.

[@user-gl2eq2ly4g]

Best 911 and restoration channel on the net

[@klassikats]

Thanks!

[@user-gr8nj8ew3e]

Looks like off a 914/6 as has a "1" before the 3C and 3C1 (I couldn't quite see the numbers clearly on the second body) Would also possibly be why the fuel connectors are backwards. Love the channel! Cheers from Oz

[@klassikats]

So the "1" just means that they were built between 1970 and 1971 as both the 914/6 and the 911T models use the 1-3C/3C1 carburetors. These carbs will be heading for a 914/6 car once they are done.
Kurt

[@stefanlindemann6886]

Dear Kurt,
thank you so much for all your videos on rebuilding carbs - I've seen them all and they helped me a lot 😄
I'm having one little question left: what's your best-practice to inspect the throttle shaft bushings? Both for Zenith and for the Weber with the teflon insert. I assume they wear to an ellipse form...?
Looking forward to many more videos 🙂
Greetings from Germany, Stefan

[@klassikats]

So most of the wear that i see is in the throttle shafts more than the bushings. The Teflon bushings I just always replace and dont really look at to hard. The bronze bushings I measure using a pin gauge and replace or oversize as required.
Kurt

[@stefanlindemann6886]

@@klassikats Dear Kurt, That's very good news (I ordered a 8.000mm pin gauge already) - thank you so much for your prompt reply. From which rocking of the pin gauge would you refrain from reusing the standard shafts? >0.1mm? Or less/more?

[@klassikats]

So the running clearance should be 0.03 - 0.05mm usually the throttle shafts will measure 7.97 to 7.99 mm and the shaft bushings will 8.00 - 8.03 mm. I will discard the throttle shafts at 7.94 mm and will replace bushings or overbore, which ever one you prefer, at 8.05 mm. It is very rare for me to be able to reuse throttle shafts. Most of them measure well below 7.90 mm in the bushing area.
Kurt