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    crosbyman

    Canada Member - 1 Year
    Replies: 1721
    Topics: 204
    #217485

    how to test coils…

    http://www.pochefamily.org/outboard/Coils.htm

    as to testing condensers well that is not very practical since you can’t simulate real operating conditions but….

    should should not see a short…

    . and a good old analog needle meter can give you a clue.

    black test wire to casing red to wire should give you a momentary swing to short or low resistance… then the needle (ohms) should raise to infinity as the condenser charges up with the internal sensing battery from your meter.

    modern electronic meters don’t give much of a visual while they sample the resistance build up.

    again not a proof but that is what you should see on condensers .

    Joining AOMCI has priviledges ๐Ÿ™‚

    • This reply was modified 2 months ago by Avatarcrosbyman.
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    Samuel Phelps

    US Member - 1 Year
    Replies: 171
    Topics: 24
    #217516

    where did you mesure the secondaries… at the end of the plug wire on on the screw pin inside the coils coils should read 4-7 kohms

    Yes that is where I tested . I didnโ€™t get any reading just OL .. I have both a digital an an analog meter.

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    crosbyman

    Canada Member - 1 Year
    Replies: 1721
    Topics: 204
    #217521

    well…if your testing is accurate that would indicate 2 open coils which coincides with the outcome (no sparks)

    chineese coils are cheap and have worked fine for me …… if you are not in a hurry the ones with free shipping area good deal

    https://www.ebay.ca/itm/1-5-40HP-Outboard-Engines-Ignition-Coil-For-OMC-Johnson-Evinrude-584477-582995-/203046524200?hash=item2f46841528

    they don’T come with the little rubber boots on the coil/wire junction so just install the old ones ( I also add dielectric grease inside under the boots)

    Joining AOMCI has priviledges ๐Ÿ™‚

    • This reply was modified 1 month, 4 weeks ago by Avatarcrosbyman.
    • This reply was modified 1 month, 4 weeks ago by Avatarcrosbyman.
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    crosbyman

    Canada Member - 1 Year
    Replies: 1721
    Topics: 204
    #217525

    see pic

    oops wrong post

    flow

    Joining AOMCI has priviledges ๐Ÿ™‚

    • This reply was modified 1 month, 4 weeks ago by Avatarcrosbyman.
    • This reply was modified 3 weeks, 4 days ago by MumblesMumbles.
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    Samuel Phelps

    US Member - 1 Year
    Replies: 171
    Topics: 24
    #219901

    Back on it a little .. Hard to find time ..
    I guess where I checked the secondary on the coils beforeI was not getting good contact on the pin inside. So rechecked and one coil was 3900 ohms and the other was 7100 ohms ..
    So checked the plug wires . Top one zeroed 0.0 out and the bottom one I could not get reading OL .. Is there a standard plug wire set I can get with the plug boot molded in or will I need to make my own ..
    I picked up the points and condenser set . I checked the condensers with an analog meter the old and new . They all read the same for the most part . The needle would jump then ease back to infinity.. If that sounds right ..

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    crosbyman

    Canada Member - 1 Year
    Replies: 1721
    Topics: 204
    #219908

    just use 7mm metallic core wire NOT CARBON boots are available ..check on ebay bike and tractor shops may have wires with the boots installed just use 7mm wire to fit the coil spike properly

    keep and reinstall the little rubbers on the coil … I use some die lectric grease to keep moisture out

    condensers testing with a ohmmeter is not fool proof it is basically only good to test for shorts or no short but the kick to infinity is reassuring ( read the latest AOMCI outborder magazine on condenser testing)

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    Samuel Phelps

    US Member - 1 Year
    Replies: 171
    Topics: 24
    #219924

    Thanks Crosby, there were no rubber boots on my wires where it connects to the coils .. Could I use some of that liquid electric tape stuff to seal the connection ?
    Just read through the article in the outboarder.. Iโ€™m not sure if my digital meter measures capacitance or not . I donโ€™t have one of the coil/condenser testers either ..
    Iโ€™ll post a picture of the meter that I have . Maybe you could tell me if it can measure capacitance . Sorry for my ignorance and thank you for your patience..

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    Samuel Phelps

    US Member - 1 Year
    Replies: 171
    Topics: 24
    #219926

    This is what I have ..

    134D7C43-7772-4B05-AF5D-FEB08C5E6615

    • This reply was modified 3 weeks, 4 days ago by MumblesMumbles.
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    crosbyman

    Canada Member - 1 Year
    Replies: 1721
    Topics: 204
    #219928

    it won’t measure capacitance but remember meter testing is not as valueable as proper dynamic testing with voltages around 300 vdc to check if the inner foils are properly insulating the 2 foils

    worst comes to worst if you suspect the condensers just buy new ones. hopefully they will be good ones ๐Ÿ™‚

    when I do not have the little coil boots I just screw the 7mm wire in with a dab of dilectric grease . you could always try heat shrink tubing over the screwed in wire/grease

    carefull with liquid tape and stuff which may contain carbon particles

    if grease won’t do for you, high voltage silicones are available to protect old style TV high voltages on the flyback transformers (25Kv !!!)

    Joining AOMCI has priviledges ๐Ÿ™‚

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    Samuel Phelps

    US Member - 1 Year
    Replies: 171
    Topics: 24
    #219933

    I have dielectric grease.. Iโ€™ll use that ..

    Mumbles
    Mumbles

    Canada Member - 2 Years
    Replies: 4550
    Topics: 353
    #219957

    Your primary ohm readings are good but the Open Loop (infinite resistance) reading on the secondary windings means there is no continuity or your meter can’t read high enough. Where were you taking the secondary reading from, the pin inside the coil where the spark plug wire attaches or at the spark plug boot? A poor connection between the spring terminal inside the boot to the wires core can give a high ohm or OL reading. The secondaries should measure somewhere around 3.5 – 4 thousand ohms for those coils.

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    Samuel Phelps

    US Member - 1 Year
    Replies: 171
    Topics: 24
    #219987

    Mumbles on the coils the secondary readings were 3.9 on one and 7.1 on the other . They did not go back to infinite res . I did do the test on the spike pin on the coil .. I should get some new 7mm plugwire tomorrow.. Iโ€™m not real confident on the old ones ..
    How does the ignition plate come off on this motor ? Does it just pull straight up ? I would like to do a little clean up before I install the new points and such ..

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    Samuel Phelps

    US Member - 1 Year
    Replies: 171
    Topics: 24
    #220010

    How do you attach the plug wire to an end like this ?
    Does it solder on ?

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    dave-bernard

    US Member - 2 Years
    Replies: 1247
    Topics: 17
    #220012

    I would solder then crimp.

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    cajuncook1

    US Member - 1 Year
    Replies: 813
    Topics: 69
    #220015

    Those little ends should have small spikes that stick into the wire. Those little spikes make contact with the copper wire inside. You then shove the ends attached to the spark plug wire into the boot. You should see the little metal cup fully seated in the boot open when properly seated.

    This YouTube video is not exactly what you have, but it should give you general idea.

    Some people like to expose about 1/4 inch of the copper wire and bend it back on the spark plug wire. Then apply the crimp attachment for better contact. Then insert it into the boot as previously mentioned.

    https://youtu.be/bEg63iRdjH4size

    This is not my video, but random one i found on YouTube on the fly.

    • This reply was modified 3 weeks, 3 days ago by Avatarcajuncook1.
    • This reply was modified 3 weeks, 3 days ago by Avatarcajuncook1.
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