Reply To: What Year 40 Johnson?

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April 28, 2021 at 1:14 pm #237317
David Stanton
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    The flywheel nut is the bigger 1-1/16″ hex, so it must be 1962 or later. The automatic choke mechanism changed in 1964, so it must be a 1962 or 1963.

    Did that crankshaft change come with the change to 50 to 1 gas/oil mix?
    Dave