Re: Legality of 2 strokes.
Just like in motorcycles the hole shot with a 2 stroke tends to be better. Also given such a simple engine easy to wrench. I had a old sea gull that I used for 20+ years. Finally gave it away as could not get parts with out a lot of hassle. I have a 2HP Yamaha 2 stroke of same vintage which I still use on a square back canoe for fishing. It sits for months - then one pull and it goes. No neutral or reverse so not a good dinghy engine.
It's a shame they were outlawed. If the Yama got wet a squirt of ether in the cylinder put the plug back in and go to town. Amount of pollution trivial compared with a poorly tuned 4 stroke or when a 4 stroke is run with choke or too rich.