Mercedes 1956+220S

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pg - 02 Aug 2006 03:14 GMT

Is anyone familiar with the fuel octane adjustment on the dual Solex
carburettors for the six cylinder. It is an adjustment knob just right
of the choke and only turns approximately 180 degrees. I suspect it fine
tunes the rich/lean mixture but I've not found any specific literature
on it.

Thanks

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Roland Franzius - 02 Aug 2006 12:01 GMT

pg schrieb:

> Is anyone familiar with the fuel octane adjustment on the dual Solex
> carburettors for the six cylinder. It is an adjustment knob just right
> of the choke and only turns approximately 180 degrees. I suspect it fine
> tunes the rich/lean mixture but I've not found any specific literature
> on it.

Its the idling gas enrichment regulation. Close the screw until the
idling becomes unround then open it half a turn.

More difficult is the procedure to synchronize the two Solex
carburetors. A good check is to put both hands symmetrically at 2000 rpm
like caps over the carburators air intakes and to balance the resulting
vacuum suction on your fingers.

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Roland Franzius

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