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  1. #1
    Member
    Join Date
    Dec 2006
    Location
    Auckland
    Posts
    3

    trouble shoot Johnson 50hp 1975

    Hi There got a Johmson 50HP that has stopped firing on cylinder 1. checked plugs checked coils changed power pack last thing is the sensor coil. would i be right that the coil could have gone on the one side. Is there a good on-line site to buy a new / second hand coil.

    Cheers

  2. Member
    Join Date
    Dec 2005
    Location
    Oklahoma City
    Posts
    823
    #2

    Re: trouble shoot Johnson 50hp 1975 (ptheuma)

    Check continuity on the stator also.

  3. Member
    Join Date
    Dec 2006
    Location
    Auckland
    Posts
    3
    #3

    Re: trouble shoot Johnson 50hp 1975 (OkieBoatMech)

    Would this take out one cylinder ?.

    Cheers

  4. Member
    Join Date
    Dec 2006
    Location
    Auckland
    Posts
    3
    #4

    Re: trouble shoot Johnson 50hp 1975 (ptheuma)

    Put in a new triger/sensor coil and still not firing on the top cylinder. Anybody got any ideas . cheers

  5. SC Club Moderator ChampioNman's Avatar
    Join Date
    May 2004
    Location
    Crawfordville, FL/Lake Hartwell, SC
    Posts
    72,186
    #5

    Re: trouble shoot Johnson 50hp 1975 (ptheuma)

    Did you check plug wire or coil ohms? You can always move the coil to another cylinder.

  6. Member
    Join Date
    May 2004
    Location
    Nashville
    Posts
    11,165
    #6

    Re: trouble shoot Johnson 50hp 1975 (ptheuma)

    How did you check the spark?

    With the spark plugs or another devise?

  7. Member
    Join Date
    Sep 2008
    Location
    CLEMSON
    Posts
    9
    #7

    Re: trouble shoot Johnson 50hp 1975 (RUSTY63)

    im haveing the same problem with the same exact motor. checked for fire, and both cylinders are not firing. whats the best way to check, cus all i could do by my self is rig something up to turn the key and hold a screw driver to the plugs. any better way.

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