With The Help Of Some Of You I Now Know That It's A 1955. I Am Doing A Complete Restore And Need A Manual And Can Only Find 1956 And Up. Its A Evinrude 71/2 Model #7518 (1955). As You Can Guess When I Pulled The Lower Unit Several Washers And O-rings Fell Out Before I Could See Their Location And Need The Manual To Put This Beast Back Together. In Advance - Thanks!