Thanks, My engine icon does come on, so at least you have told me I have some type of emissions issue. I will also make sure that the marina mechanic is a catalyst trained tech. My marina isn't a Volvo Penta dealer, but my dealership I bought the boat from is and they can do Lake visits with one...
I have a 2014 Chaparral with a V8 300-CA Volvo Penta I/O. I had an engine alarm, and the Marine Mechanic said that the code reader said it was the the manifold temp. sensor, so the replace the impeller and the impeller housing, because it had a small crack. The impeller was missing one fin...