Reply To: Mercury 4.5hp, 1974

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April 3, 2020 at 6:53 am #199058
mercuryspecialist
Participant

    Hello,
    The service manual states that the low speed coil has red and yellow wire leads, and the high speed coil has blue and yellow leads. Additionally, a 1974 model would still be a Merc 40 (4 horsepower), 1975 was the first year model for the Merc 45 (4.5 horsepower).

    Regards,
    Joe