Mercury KE4 Ignition

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    #160528

    I get 3.2 on the primary for both and 5.7 on one secondary and 7.2 on the other secondary. I like your idea for the coils but it would be nice if someone could tell me if my readings are good or not. I don’t want to go through all of this for bad coils.

    How do you test the capacitors?

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    #160531

    Great. How would I find that?

    seakaye12
    seakaye12

    US Member - 2 Years
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    #160618

    Capacitors are challenging to test without an ignition tester like a Mercotronic or Stevens. You can do simple tests with an ohmeter; test for a direct short (shouldn’t be shorted of course…) and then you can test with an analog meter and watch for just a bit of a bump of the needle on the 1k resistance scale. The needle should deflect just a bit and then return to rest. But these are simple basic tests that cannot indicate a cap which will fail under load. Usually they are just replaced if suspected bad.

    I have resisted answering your question about the variance in the secondary resistance. I would think they should be the same if they were the same brand/vintage/model of coil….but I have seen many instances where coils will vary like that and still work. Like I stated in my first post here….if it were me I would clean things up and try running the motor or just do a spark test. Simple, quick and informative. If this is a motor that you want to build to be a daily runner then you will most likely want to replace coils, condensers, wires and points as the budget allows and parts become available.

    • This reply was modified 1 year, 3 months ago by seakaye12seakaye12.
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    #160685

    Thanks for your help. I will do just that.

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