I thought that that propeller looked familiar, so I went out in the garage. Turns out my 1941 Waterwitch 571.35 air cooled 1 HP (earlier motors are 3/4 HP) has an Alcoa that looks almost exactly the same apart from a slightly wider blade tip in proportion to the area of the blades near the propeller (although that could have something to do with the picture), and no number marked on it. It appears that the rotation direction of that propeller is the opposite of mine, although that could have something to do with a picture flip somewhere along the conversion process from jpeg to image adress/url. Due to the size, I would guess that that propeller is also from a 3/4 HP Waterwitch. 1941 was the last year of the air cooled to my knowledge, so that would be an earlier air cooled if it is air cooled, or it could also be a water cooled engine, which would probably have been made before 1941 as well.
"Outboards seem to multiply exponentially..........I find that for every finished project, there are two more waiting to be completed."
