im having the same problem as you right now, everything tested out alright but got 0 output out of the yellow wires. So i ordered a used stator/field coil and case off ebay just to see if another one works. I stripped out two bolts on my old stator cover anyways and for $40 bucks i figured id just try a whole new setup that the seller guaranteed to work. We'll see, if this doesn't work i don't know where else to look.