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  1. #1
    Cadet
    Join Date
    Apr 2002
    Location
    Hanover, Pa
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    14

    Default 115 johnson tach. not working(Mr. Schematic?)

    my 1995 johnson 115 crossflow's tach cuts out and rarely works and when it does it only registers below 1000 rpm's. i've been advised to do a voltage check at the battery when running and i get 13.5 volts through all speeds. i've also checked connections and cleaned. my question is this, if my regulator/rectifier is putting out 13.5 volts can it still be faulty keeping my tach. from working? also i just purchased a new complete set of omc gauges on ebay....only problem the new tach. has a 8 pin wire reciever and my current unit doesn't any help locating a plug would be appreciated.thanks to any one who replies!

  2. #2
    Petty Officer 3rd Class
    Join Date
    Mar 2002
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    96

    Default Re: 115 johnson tach. not working(Mr. Schematic?)

    I had a problem on my Johnsons. The tach did not work and temp gauge was malfunctioning. It was the voltage regulator. Sorry, my work is done by a mechanic, so i can't offer repair advice.Michael

  3. #3
    Cadet
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    Apr 2002
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    Default Re: 115 johnson tach. not working(Mr. Schematic?)

    ?

  4. #4
    Petty Officer 1st Class Valv's Avatar
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    Jun 2001
    Location
    Lonsdale, MN. / Knife River, MN.
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    390

    Default Re: 115 johnson tach. not working(Mr. Schematic?)

    You might have a tach with System Check (4 little lights on gauge). I believe this will work only with engines with that system. You might have to buy a different one.Val
    1992 Silverton 34 Convertible w. dual station
    1990 Baha Cruiser 260 Fisherman

  5. #5
    Petty Officer 2nd Class G-Daddy's Avatar
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    May 2002
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    193

    Default Re: 115 johnson tach. not working(Mr. Schematic?)

    I just finished a repair on my 1992 Johnson 100 cross flow yesterday. The tach would cut out, run up, then shut off. Very inconsistent or no readings. I changed the voltage regulator and the tach now works perfectly. I had to pull the flywheel and remove the stator to get to the voltage regulator bolts. If you don't have a manual I suggest getting one and reading it thoroughly before starting the repair.
    Age and treachery will always overcome youth and enthusiasm

  6. #6
    Moderator Bob_VT's Avatar
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    May 2001
    Location
    West Rutland, Vermont, United States
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    24,368

    Default Re: 115 johnson tach. not working(Mr. Schematic?)

    Here is the link to the teleflex self help pages http://www.tflx.com/PDF/99320.pdf even if your tach is not a teleflex it will give you a basic understanding of the troubleshooting.Bob
    This is a great link to boat specifications http://boatspecs.iboats.com/
    Please, shop iboats first!!


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