After I did this video, I realized I hadn't oiled it. When I put a little steam oil on the bits that move against metal, it quieted down quite a bit. Likely a dab of lite grease would be better, especially that pivot point and where the bar slides on the coil cover. The shaft for the flywheel is tiny and its very hard getting the wheel straight. That is because the shaft slightly wiggles in the flywheel's hole and when you tighten the set key the flywheel wants to tilt. Also, the shaft isn't long enough to make all the way out/even to the outside of the wheel. Which if the shaft made it a few millimeters out the other side of the wheel, I think it would be a lot more stable.
As I expected, this isn't a very powerful engine. For one, I seriously doubt 1930s D-Cells would last very long. I tried to run my Empire swing and it couldn't even try to move with it connected. Perhaps it could run the table saw or polishing wheel.
It makes me wonder if this engine wasn't contracted out and made by some other manufacturer for Empire. It really seems like a odd ball when comparing it to all the other Empire engines & accessories. Not having any markings or label for a engine just isn't like Empire.