I was in at my local today and I grabbed a plug. He had a GXV160 on the shelf abd it didn't have made in China on the back of the steel top near the rear fuel tank screw. It did have China printed on the tag hanging off the oil fill tube.
I popped in the new plug, fresh oil, new air cleaner and pulled off the fuel tank, rinsed it and the strainer and put it back together.
I pulled it over 4 or so times and it started. They certainly are quiet.
This one has no throttle control, just flat out. I'll suss it out in more light tomorrow to see if there is something I can do about that.