I've got a '69 evinrude 115 electroshift. Model number 115983E. Currently has a 13-3/8x17 prop on it. Due to a mishap I jacked it up. Transom saver mishap at highway speed. Anyway question I have is does anyone know which spline count and hub size I need without me having to take the prop off? I can't seem to find that year when I search by pitch.