Reply To: Mercury Mark 6A

[JACQUES]

just go on chat gpt and ask  here is one answer

For these vintage magneto condensers (like the 398-693 / 18-5206 replacements):

• The capacitance is generally around ~0.15 μF to 0.20 μF (sometimes quoted as ~0.18 μF) with appropriate voltage rating (typically 400–600 V or higher) for ignition use.

that said   the common .22uf OMC condensers should do and available if not you can go  ceramic  just for trial

if you have the condenser casings you can just refill them with .22uf  if fitting in modern ones  is complicated fit wise.

see articles  parts 1-4

Magazine Articles | Western Reserve Chapter

 

 

 

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