check the electric choke by taking of the air cleaner and see if it shut whwn coldd and poen when hot
mnsKmobi ·
Sounds like it is "overchoked" that is, the mixture is too rich (too much fuel/not enough air) when the choke is on. Can't help with fixing it, not being familiar with beetle carbies.
70AutoStik ·
I'd agree - black smoke suggests a bit rich. Remove the air cleaner and adjust the body of the electric choke (after loosening three screws,) until the choke is open by about 1-1.5mm when cold. Switch the engine on and watch that the choke opens smoothly.