Can anyone tell me the Crankshaft Part Number for these 18 Hp Evinrude Model #'s <br />18302E (1963 i believe) <br />18403D (1964 i believe) <br />18304A (1973 part # 0315286) <br /><br />I have located two good 1960's crankshafts and am wondering if they're the same as the 1973. <br /><br />The Evinrude diagram site only goes back to 1968.