Funny, right after you told me i tried a 4 cell lipo I had lying around and it went right through to start up. It was night time so I unplugged it and got ready to try it the next day.

Next day after 4 different batteries tried, it never spun again. I am setting about getting the PC interface to work as I don't want to troubleshoot this without being able to see what is going on in the ECU. Some setting must be wrong.

Of course that PC program does not work either, when I move the throttle stick the pump voltage readout changes on the PC....