alt Hacker News"Fuel efficient" - that's probably why. If the fuel efficiency more than off sets the additional weight, for range then four stroke might be indicated. There are lots of other factors to consider.
Replies
UniverseHacker • today at 2:23 AM
Four stroke engines are also quieter, last longer, and have lower emissions, but cost a lot more to make as they are much more complex.
I guess this is an old engine, but it's bizarre to me that fuel efficiency could be a factor for something this slow and light.