Start button is constantly making contact, or short in the start button circuit near the steering neck connectors.Little more digging found these issues.
1. Power always on to the low voltage feeding solenoid when key is turned on.
2. No power to tail light (as should be there if the key is switched on) but light does come on when I press the "Start" button.
And again, if the switch is turned on, the engine immediately starts to turn over. So something is switched.
I think the ECM may be bad, but would like to test it prior to ordering a replacement. I can't find directions for test the unit.