Re: 1964 Johnson 40 hp Ignition System & Airguide Tach Compatability

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June 24, 2015 at 6:06 am #18805
Mumbles
Participant

    You might need a matching transmitter (signal generator) to get your tach working properly.

    The 653 instructions are available here for $1.79.

    http://www.classicboatwork.com/classicp … truct.html