Finished adjusting the choke gap. Thought I would share how I did it. It is simplified from the procedure in the manual, because you do not have to simulate a cold engine.

Tools needed:

Very small screwdriver
Vacuum pump
1.5 mm allen wrench.

- With cold engine, as in sits overnight, remove air cleaner.
- Open/close throttle with linkage quickly. Observe that choke flap closes completely
- Disconnect the pull-down's vacuum line from base of carb
- Apply vacuum to pull-down with pump. The pull-down should hold vacuum and the choke flap should open slightly.
- Measure the gap between the front of the choke flap and the vertical surface of the carb top plate using the 1.5mm allen wrench as you would a feeler guage.
- Adjust the gap by turning the screw on the back of the pull-down unit. In = smaller, out = bigger.
- Reconnect vacuum line, replace air cleaner.

If you have the old-style pull-down with the dashpot and by some miracle, it is still holding vacuum, then the procedure is the same, except that you adjust the gaps by closing or widenening the "jaws" of the "V"-shaped linkage that attatches the dashpot to the pull-down.

__________________
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe