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#74463
mercuryspecialist
Participant

    Our factory serial number charts do agree that 4981805 would be a 1978 Merc 700 (70 horsepower) assuming that it is an in-line 3 cylinder. There was only the 700 model offered in a 3 cylinder (for 1978), 4825249 is the starting serial number for these for 1978, and 5128280 is the starting serial number for 1979 and referred to as a Merc 70.

    Regards,
    Joe