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  1. #1
    Cadet
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    Feb 2009
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    Default 77 75 hp No spark Cyl 3 Change out coil?

    ThanK You in advance for this great forum & all the outboard savy contributors

    I was about to run through the Reeves Link & Sync procedure & set the spark tester for 7/16" (motor has been bogging under load)

    Decided to check spark on each cyl, and guess I am not getting any spark on number 3.

    So is there other checks I need to make before replacing the coil?

    This motor is a 1977 75hp Model 75743s


    Todd Aka DenSVXer
    Littleton, CO

  2. #2
    Petty Officer 2nd Class
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    Sep 2008
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    St. Louis, MO
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    169

    Default Re: 77 75 hp No spark Cyl 3 Change out coil?

    You might want to try switching that coil with one of the other ones on the motor and see if the no spark problem follows the coil. I would mark the coils as it is easy to get them mixed up as you troubleshoot the problem.

  3. #3
    Supreme Mariner Joe Reeves's Avatar
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    Default Re: 77 75 hp No spark Cyl 3 Change out coil?

    Switch, temporarily, the orange leads that go from the powerpack to the coil so that whatever orange lead was firing #1 or #2 coil now fires #3 coil.

    If #3 coil now fires (has spark), then obviously the coil is okay. Be sure to switch those orange wires back where they belong.

  4. #4
    Cadet
    Join Date
    Feb 2009
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    Thumbs up Re: 77 75 hp No spark Cyl 3 Change out coil?

    Thank You Joe, you saved me a needless part purchase

    I switched the orange leads #2 coil to position #3 and vice versa on the power pack and now the #3 coil fires and #2 coil does not.

    I guess this means I need a new power pack?

    More costly than a new coil (figures my luck)

  5. #5
    Supreme Mariner Joe Reeves's Avatar
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    Default Re: 77 75 hp No spark Cyl 3 Change out coil?

    That normally does indicate a failed powerpack.

  6. #6
    Cadet
    Join Date
    Feb 2009
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    10

    Default Re: 77 75 hp No spark Cyl 3 Change out coil?

    Thanks Again Joe

    Powerpack Installed
    Timing light is picking up signal on all 3 cylinders

    Now to get it sync'd up

    densvxer

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