[Yosemite Sam]

For running an engine "on the bench" you need hot battery/boost box, clamp the pos cable to the "A" terminal on the S/G and run a jumper wire to the pos side of the coil, clamp the neg cable to the engine somewhere (the rear S/G mounting bolt works pretty well).

If you don't have a switch of some sort, your S/G will immediately start turning the engine over when you hook the neg cable up.

Once your engine starts, remove the clamp from the "A" terminal. To kill the engine, remove the jumper wire from the pos side of the coil.

Technically I don't think the S/G is actually "making" electricity unless the "F" terminal is grounded. Don't ground the "F" terminal for very long at a time, you can burn the field windings out.

Be careful and good luck.