John,
I am running a Rotax 912.
I considered the suggestion you made regarding my earlier thread on electrical wiring. For now was intending to stay as wired be but may now have to reconsider.

If I understand correctly, I should be measuring alternating current across the two shielded wires from the engine to the rectifier.
Then the lead from the rectifier to the buss and on to the battery should be direct current measured across the common ground. Understood so far???

With the engine turning 2000 rpm I got no voltage increase at the battery in comparison to the battery without the engine running. I suspect that means nothing is coming from the rectifier. But first I will determine if any power is going to the rectifier. If not, then I have a connection failure or an inoperative dynamo. I hope it is a poor connection and will not be surprised if the rectifier is not working.
Thank you for your thoughts on this.
Bud