Re: Interpreting an expansion plug number?

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October 1, 2016 at 5:18 pm #45010
Anonymous

    The hood looks like it could be 1964, But I would expect that all the 1960’s 40hp covers would interchange:

    https://web.archive.org/web/20050826170 … _1964.html
    https://www.youtube.com/watch?v=gNVqTQXztkAB

    Finding the model number, which would begin with "RD" on the block plug, or the transom bracket, would be the BEST indication of the year.

    I think 1962 was the year with the heavier crank.

    Wait, the last serial for 1961 is 2,249,094 so J2457020 is later, and could well be 1964!