I bought a 9.8 tohatsu for my avon air a couple years ago. It was said to weigh under 80 pounds and i thought. Well i can muscle that ok. But i can't and it needs 2 to put it on and off the rail mount. I leave it on the dingy on the davits now when sailing but wish i had gone with a lighter motor. Just sayin..
Yes... I have a 60 pound Honda 5 HP. I thought it could be muscled, and maybe when I was 25 it could have been. But at 66, it cannot be, and recently I had to move the motor mount down on the WWP19. It took two of us: one to life the motor up, one to slide the mount down.
2 strokes are nice, but unless they are electronic fuel and oil injection, you can no longer buy them in the USA---so all the small ones are out. Not a big deal if you can drive to Canada.
I also have a Torqeedo 1003L. I've not used it yet on the boat since I don't have an auxiliary motor mount yet. But I could, with two people remove the Honda if it died, and put on the Torqeedo. One battery give 3 knots for 2.5-3 hours on my boat. 30 minutes at 5 knots; two batteries double that. I suspect that when I change my main mooring next summer to a more sheltered part of the bay, I will not be using the Honda at all. Torqeedo only weighs in a 30 pounds; even I can manhandle that.