Hi fellow benz-heads,

Been awhile since I posted here but I've still got my old fintail and I'm having an issue with the choke pull-off on the rear carb. It's not too big a deal but it does mean that when the car is in mid-fast idle mode it has a bit of a rough time idling at that higher speed because it's loading up a bit on the back cyls. It doesn't stall but I wouldn't try driving off like that either. Luckily the front pull-off is working fine so at least the fast idle speed cam is where it is supposed to be during and after start-up. Once warm enough it's fine of course so it ends up being a minor issue.

For the uninitiated, the zeniths have three idle speeds, very fast idle for when cranking and immediately thereafter when cold, mid-fast idle for once it has started when cold and regular for once it's warmed up enough. In practice the very fast idle, which is spec'd around 2200 rpms is not really seen because the choke pull-off pulls it back to mid-fast idle around 1600 rpms as soon as the engine fires (basically that very fast "idle" is only to have the throttle opened wide enough to start with the choke snapped shut)

All that is done by the front carb, which on my car is operating flawlessly. The rear carb has no idle cam at all and the choke only cares about the flap itself. Currently the pull-off diaphragm appears to be shot because it doesn't do anything and the rear carb choke stays closed (hopefully it's the diaphragm and not the little vacuum passage being plugged). At any rate, how do I get this thing out of there? I can undo the three screws at the top of the pull-off and remove the triangular cap with the adjustable stop but i'll be damned if I can figure out how to get the rod that actually does the "pulling" out. If the round choke cover/heated spring is removed from the side I can see that the business end of the pulloff rod has a flat in it that the choke pivot sits inside. There doesn't seem to be a way to actually remove it past that flat, not enough wiggle room, anyone done this?

Regards,

__________________
___
/<>/>/>
1967 230S automatic
Boston, MA