I got an unexpected break this afternoon, so I fired up the OS 160. Brand new out of the box. It started on 3rd flip. I ran two 14 oz tanks of 15% Cool Power through it. Kept it rich according to break-in instructions in book.
First numbers - at end of 2nd tank, still very rich, stock OS muffler:
APC 18x6W -- 8850 - 8950 rpm. Lifted 17 lbs, 10 oz on my test setup.
I can tell I am going to like this engine.
More to come next week.....