My father bought one of those in the early sixties. We used it to top mole trees.
Reply tempermental little gadget. Basically an overgrown model airplane engine. Vibration would find some new part to crack or loosen up every day. If you set it down in the snow too many times, it would get moisture in the wrong places, and you were all done until it could dry out overnight.
This was the base model, the only controls were a choke lever, a primer button, and a kill switch. There was no clutch or throttle, it screamed wide open all the time. They made another that had a trigger throttle, but I think, still no clutch. Because it was sometimes hard starting, and we were trying to get things done in a hurry, I would leave it running while walking between trees. Scary to think about now, but I was sixteen, and what did I know.
The thing is still hanging, on the wall in my shop, and I think their may even be a few spare parts for it.