Thanks for the advice so far.

I wasn't on the boat this time, but here's what he told me:

He launched it, idled through the no wake, took off and as soon as it was on plane the light came on and the beeping started (I'll need to check with him as to the frequency). He brought it off plane and the light turned off and beeping stopped.

Put it back up on plane and it immediately started again. Brought it down and it stopped again.

He idled back and trailored it.

He told me that it wasn't overheating, but I'm not sure how he knows except by the gauge, I guess.

It is oil injected and there was plenty of oil. I know that doesn't mean the injector was working. With my very limited knowledge, I immediately assumed it was the oil injector, but wondered why it would stop when it was idling.

I guess it was misleading to me to say WOT.