It sounds as if it is in 4T. Move to 2T or pedal mode. Unfortunately that factory folded up as far as I know. We moved production to our other factory in 2012.

Now, if it has failed, I do have a personal 210 of that era with about 6 hours on it. No guarantees, but I would sell it if things can't be turned around on that one. It's dusty, but very little use. Has sat on the bottom of my cart for years.