Hmm most of the new mercs 200HP and up are proxs 2 stroke motor.
Maybe some using the small Hp elpto 4 strokes but all the new big motor mercs are 2stroke.
I do agree the sho is a 4 stroke and one of the most efficient motors there is. But it's no speed demon
Haven't seen the Nitro's come rigged with 200-250 4 strokes because they're trying to keep the price down but you can get them. The Mako boats do come with the big 4 strokes on them. The reason Skeeter has the 4 stroke Yamaha's is of course because Yamaha owns Skeeter. I have no problem recommending my 4 stroke because it's been a great almost maintenance free engine, is super quiet and sips gas. Speed is not an issue with me.