Reply To: 1930 Johnson A-50 Keyway

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June 23, 2022 at 9:33 pm #261874
Buccaneer
Participant

    US Member

    My 1929 J-25 used the double woodruff keys, and they were #6 keys,
    also known as 505 keys. Not sure if yours would be the same.
    Attached is a chart I used.
    woodruff-key-dimensions

    Prepare to be boarded!