It has the properties of a two stroke engine. I hesitate to call it a two stroke because that isn't strictly true, apparently. However, it has a narrow power

It has the properties of a two stroke engine. I hesitate to call it a two stroke because that isn't strictly true, apparently. However, it has a narrow power band, like a conventional two stroke. This means that it's a poor engine outside its power band; excessive emissions, inefficient, etc. Inside its power band it can be tuned to be clean and efficient. So using it for constant RPM applications such as a generator can make sense. Using it as the prime mover where a wide power band is needed is a bad choice.