Reply To: 57 Johnson 35 hp – Tachometer?

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April 3, 2019 at 1:09 pm #172548
frankr
Participant

    Modern motors / tachometers work by counting the AC pulses from the alternator. Since your motor has no alternator, you are somewhat limited in what will work on it. You need something that counts the pulses from the magneto, or one that counts the pulses at a spark plug. Tiny Tach is a popular one of the second type.