[1955cj5]

I don't really understand why, but with the black/negative cable from the 12v portable jumper box clipped to the generator case, and the red cable to the output post, the generator motors to the left as viewed from the rear.

With the positive/red cable connected to the case, and the negative cable hooked to the output post, the generator motors to the left also, as viewed from the rear, and at the same apparent speed.

Like starters I guess, built to rotate in one direction only.