Mercury Mark 6A

[Aidan Smith]

Also working on a Super Silent 6 from 1959. It DID have spark for a brief second on the upper plug, then nothing after I cleaned and regapped the points.

Are the condensers known to fail on these motors? I think that the coils are OK, but I will not be able to test them until Friday.

Thanks

"Shells sink, dreams float. Life's good on our boat."
1931 Johnson A-50
1950 Mercury KF-7
1951 Mercury KG-7
1956 Johnson JW-12R

[crosbyman]

check for cracked insulator blocks    do basic testing on condensers or simply replace  60 year old parts   ask chat gpt for detail test procedure.  check coil  electrical cotinuity to boots.

Joining AOMCI has priviledges 🙂

[RICHARD A. WHITE]

With your wonderful exuberance towards these old motors… You would do well to find a Mercotronic or Stevens ignition tester. If you are feeling REALLY ambitious, there are instructions to make your own out there…really helpful with these old girls..

http://www.richardsoutboardtools.com
classicomctools@gmail.com

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Aidan Smith

[Aidan Smith]

I haven’t actually used one before, but I will learn. Do you know what the condensers are that go in there? I thought you could get them at NAPA.

"Shells sink, dreams float. Life's good on our boat."
1931 Johnson A-50
1950 Mercury KF-7
1951 Mercury KG-7
1956 Johnson JW-12R

[crosbyman]

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

 

 

 

Joining AOMCI has priviledges 🙂

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