Many thanks for your replies! The motor is labeled "EMAX 2280-2208kV". I don't recall any beeps from the ESC after power-down & didn't see a video, sorry. However, FliteTest has nicely replaced the ESC & motor, so we'll soon see. I am suspicious of connections & power starvation at high loads. (They wanted me to test it w/out a prop & it ran fine. But w/ the prop, it "pulses" above half throttle.) And I did have to solder on some different connectors to get onto the battery which had a small JST plug that also happened to mate w/ the battery charger. Maybe that little JST plug just wasn't big enough? I'll never know, because now I've cut & soldered new connectors on the battery and the charger.