Well fellow forum members, a few days in on my 16 SA550 and we have an issue. Engine started bogging down at 3000RPM and then would rev back and forth between 2500-3000 but never above. Got the attached error message (eventually) and took the boat into local dealer. Turns out the catalytic converter is shot and some localized heat damage to some hoses (melted holes). They're doing more diagnosis, working with Supra and Indmar on root cause. Looks like I am out of commission for a bit :-/. 120 hours on the boat. It was used for training and the Local DFW area Pro Wake Tour. I'll keep you all in the loop on the prognosis.

Anyone else had issues with the cat on newer Supras or Moomba's?

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