A 40hp with the single wall motor leg?Never new they had those, till they redesigned them in the 70's. Are you sure that's not like a 28 or 33 with a different hood? Take a look at the photo on the right here. http://www.old-omc.de/j_1966/seite_05.jpg
I don't believe the 40 ever had that syle of motor leg. That is one used on the 25, 28, 30, 33 and 35. The 40's throughout the whole 60's had the "Super Quiet" shroud set up.![]()
Here's the 1971 Johnson 40hp with that leg that you say they never had. But I may also be wrong as the Only thing from a 1972 forty that I found had the square cover already. So it may not be the 1972 40 either.
http://community.webshots.com/photo/fullsize/2461176460091848696KEasAH