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  1. #1

    Default 1992 15HP Johnson 15RENM with weak spark. year corrected

    Top cylinder only jumps a 1/4" gap, lower cylinder jumps a 1/2" gap. any suggestions on what to look for next .

  2. #2
    Join Date
    Sep 2010
    Posts
    24,037

    Default Re: 1992 15HP Johnson 15RENM with weak spark. year corrected

    Switch the orange / striped wires and report test results.----Test spark that way as motor will not run.

  3. #3

    Default Re: 1992 15HP Johnson 15RENM with weak spark. year corrected

    Quote Originally Posted by racerone View Post
    Switch the orange / striped wires and report test results.----Test spark that way as motor will not run.
    Purchased two replacement coils . Sierra. Big mistake ! I got a weaker spark then the weak OEM coil. I just reordered .

  4. #4
    Join Date
    Apr 2010
    Posts
    5,429

    Default Re: 1992 15HP Johnson 15RENM with weak spark. year corrected

    Try a different power pack.

  5. #5
    Join Date
    Nov 2011
    Location
    tennessee
    Posts
    5,420

    Default Re: 1992 15HP Johnson 15RENM with weak spark. year corrected

    Tis not the coils fault..they only step up what they are given. Either pack capacitor is weak or stator voltage to pack is low
    Pappys Sales and Service
    Owner and Factory Certified Technician
    Former racer KDBA (Kentucky Drag Boat Association)

  6. #6
    Join Date
    Sep 2010
    Posts
    24,037

    Default Re: 1992 15HP Johnson 15RENM with weak spark. year corrected

    Pull plug with black / yellow stripe wire apart.----Test spark.

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