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  1. May 13th, 2001, 10:28 AM #1
    chieff
    [OP] chieff is offline
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    Default new tach question

    I have a 93' merc 115. The tach on the boat went bad so I bought a new Mercury tach. I looked on the old tach and the calibration was set to 12 pulses on the alternator. My new tach does not have that setting here is what it has6P; 5P; 8C; 3P; 6C; 2P/4CWhere it is labled C=Cyl and P=pulsesWhich should I use and does Cyl mean cycles or cylinders.Thanks for the help!Chief
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  2. May 13th, 2001, 10:46 AM #2
    chieff
    [OP] chieff is offline
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    Default Re: new tach question

    Mercury's site was down but when I finally got in the setting was online. Great info on there site. By the way it is the 6P setting.Thanks again.
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  3. September 28th, 2011, 11:03 PM #3
    cajun1962
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    Default Re: new tach question

    12p = 5p
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