Reply To: FD-10 crankshft, 1956 15 hp.

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March 17, 2025 at 10:31 pm #294723
olcah
Participant

    US Member

    203711 is the casting number on crankshafts from 1956 Evinrude/Johnson 15 HP motors.  That number is shown in the attached photo of a crankshaft I removed from either a 1956 Evinrude or Johnson 15 HP.   So that casting would have been machined to be crankshaft 277594.

    Brought back this old thread as that info may be helpful to someone working on one of these motors.