I jumped the start relay and ground directly to the battery to eliminate any connection and ground issues, and it does the same thing. I also jumped my truck to the trailer batteries (couldn't get close enough to jump the generator directly) and no change. I tested the voltage and it jumps up to almost 12 and then drops to zero each cycle (as though something is shutting off the coil). I even connected a jump box directly to the generator side of the start relay while also using the start button, and it does spin a bit longer than usual, but it still doesn't start.