350 SLC 1972 troubleshooting

I open the trigger contact to find this ...



Do you think it might be a problem ?

The broken parts seems to center the trigger contacts, may be it is why I got a bad value on tc 3.

The contacts points cams are around 2mm, probably why I have found around 180° dwell angle. I need to adjust Them.




I have check the Mercedes EPC for a replacement part.
The only reference part are 000 158 01 19 or 03 19 but it is for the contact itself, not the TC cover.

Do you know if this part is still available ?


The cams seems OK.

Hi Sylvain,

yes this plate slides into the shaft of the distributor and centers it around that shaft. When one edge is missing it could start to move and cause such problems. I have seen similiar effects before when I run D-Jetronic ignition distributors in my test stand. Looked fine in static test and with measuring gauge. but then on test stand it did not! Reason was 2 loose screws of foxbravo (or his ignition distributor). I have heard of other problems where rivets of the plate under the contacts were loose.

Everything must be fixed and well centered! Otherwise Trigger contacts wander around in ignition distributor.

Hi Sylvain
and Welcome at jetronic.org

The part that is broken away is meant for centering the trigger points set as you mentioned before.
In my opinion you have to buy a replacement or you have to reconstruct the missing side.

You need a reliable and loadable function...

It should be possible to reconstruct the part using a 2,0 mm sheet metal.
The problem is the original material is zinc cast metal. You can't weld it, but perhaps solder it (maybe using a brass replacement??.
I managed to solder zinc cast metal in the past.
Or you could use the two holes to fix the spare.

The distance between the two sides has to be 18,5 mm.

I developed a tool for adjusting the points. I could send you a figure for producing it on a lathe for free.
Contact me via PM if you want the figure.

I also have a used trigger-set in good condition to sell.

Regards
Norbert

Thank you for your answers.
I will need to find a new or used part i guess.

If the distance between the two sides needs to be 18.5mm , i am far from it ...

No, you misunderstood...

Distance between rubber blocks has to be about 23,0 mm.

Distance between the missing part and the other side has to be 18,5 mm

regards
Norbert

OK