Hello Ken, please excuse me for jumping in, but as a newcomer I would like to gain a little more knowledge re motor and prop rotation and hope by chipping in on your thread now, rather than start a new topic, someone may offer advice / knowledge that would be of mutual benefit. (I hope you don't mind - would hate to offend)
I asked a similar question to that of yours a short while ago and was told that most motors, if not all, run more efficiently one way ( anti-clockwise ) and only about 80% efficiently the other ( clockwise ). The obvious question followed and (depending on how you view the motor) what was classed as clockwise / anti-clockwise and was informed that in Britain, the prop rotation is viewed looking AT the stern of the boat hence when facing the spindle at the front of the motor it turns anti-clockwise the most efficient direction, and therefore a left handed prop (as you have pictured in your post) would be the correct one to use for forward propulsion, and a right handed one would be needed if the motor was reversed. Apparently the opposite is the case in other parts of Europe (so I was informed) whereby rotation is viewed looking FROM the stern. I found this out at a recent show where I nearly bought the wrong prop as they were made abroad and identified as l/hand but were actually r/hand.
Anyway, "what do I know" as Martin would say but I hope it prompts some definitive info.
have enjoyed following your builds Ken, keep up the good work
regards, Tony.