Reply To: ID engine by number on freeze plug?? Johnson 1400229

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November 5, 2020 at 3:37 am #220148
frankr
Participant

    All RD-17 xxxx models were 1955. But the serial # you posted is for a 1956. What gives?? I’d say that IF it really is a 1955 RD-17 the powerhead has been replaced with a 1956 30hp. Many RD-17S models had the powerhead replaced due to those lower seal problems.

    Wanna know what kind of seal you have? Look and see. Sorry ’bout that.