[Haroundb]

Is the needle of the Stromberg carbrature is a stationary (fixed) one or a movable one? Mine shakes a little when you touch it as if there is a clearance in the place the needle comes out of (piston bottom).

Any ideas ?

 

[Haroundb]

So... No answer

 

[Nutz 4 Benz]

No answer Only thing I can suggest is going to the vintage forum and try asking there. Just don't make mention of your W123 or Germanstar might redirect it back here.

 

[Cyberbach]

Sorry but I've only owned fuel injected diesels so I'm not familiar with Mercedes carburetors. I am very familiar with certain types of 2 barrel carbs for bikes and ski's and their needle is stationary so as the piston is raised more fuel is delivered. If the needle is loose I would think the fuel delivery might be less precise? Is the taper on the needle consistent from top to bottom? Worn needles will actually loose some surface thickness and will no longer have a straight line look. I've torn down lots of old dirt bikes to find needles like that and after you replace it the bike runs so much better..... but I digress, you should take nutz advice and find someone with MB carburetor experience.

 

[Zedd]

A carb? Didn't those go extinct when fuel injection was proved far superior?

 

[Martin T]

The needle is fixed by a tiny screw (no. 11 in that other pic). If I remember right, there's also a little spring which allows the needle to move a bit.