While they do have 4 cylinders, they are by no means LIGHT! 😯 They are okay motors, as mercuryman said, they are just a scaled up Zephyr. Coils are usually good, impeller is metal – carb is a little funky though.
I prefer the simpler and lighter Johnson K series in that era, but the Lightfour is okay – it is really smooth. (I don’t think either of them really put out the rated 9.8/9.7hp.) If you haven’t owned one, you probably should – then you can tell us what you think!