visioneer_one:

If the engine kicks back, that means the timing degree setting is off. That's the beauty of electronic ignitions, once the degrees is set properly it's 99.9% that the engine will not kick back or back fire. Now, the problem is with the hall sensor as this is what sets the timing degrees. Yes, you up set timing when you moved the magnet closer. The reason it doesn't say anything about it in the manual is because you need a degree wheel to set it up properly. CH sells such a kit, but at this point (IMO) I'd send it back to get it fixed and updated. In other words, send the engine to BME to get that straightened out and send the ignition to CH to get that fixed up and updated. Sorry to hear your having all these problems. My BME has been a sweetheart of a engine. Good luck!

P.S. I sent mine in this summer to have a new crank put in. At the same time I sent in the ignition. Both the engine & the ignition took 2 and 1/2 weeks turn around from the time I sent them in. That's good service.