2019 Möbius with 25 hours on it. Got an error message re catalytic converter. Mechanic from the dealerships came out and ran diagnostics and everything was perfect. Pulled both sensors and they were slightly wet. He asked how we use the boat and I told him when are kids are here we surf, wakeboard etc. and run it pretty good. However, when it’s just my wife and me we toodle very slowly all around our lake at maybe 10mph and low rpms. He told me that is the issue and to run the engine hard each time out. I have run the boat twice at moderate speeds and have not gotten any warning light / error message.

2 questions: 1) does this sound correct? 2) if I run the boat hard for a while can I the toodle around at low speed/rpms?

Thanks.