Vacuum adjustment

[mulrik]

I just found out that my 051 distributor retards the ignition to much. How do I adjust it? Do I shorten or lengthen the connecting rod inside the distributor or do I adjust it on the bolt that sits at the end of the vacum unit (where the pointer saying "unterdruckdose" is pointing to)?

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'67 250 SL Papyrus White 113043-10-000023

[George Davis]

Mulrik,

you need to adjust the connecting rod inside the distributor.

The adjustment is pretty easy once you have the vacuum unit removed from the distributor.  I made a 1 degree change, and it seems to me that it took one full turn of the rod.  The hex bolt on the end of the vacuum unit is just a closing cap.

George Davis
'69 280 SL Euro manual