I know that Indmar was offering the Catalytic Converter for CARB requirements.
http://www.wakeworld.com/getarticle.asp?articleid=1059 This gentleman, who lost his son to CO poisoning indicates that the CC is the solution.
http://www.skiboatdeaths.com I also talked with the attorney that was pushing the class action suit and he also spoke to the Catalytic Converter as the "answer".
Does anyone have a link to the research that spells out the reduction in CO with the use of a Catalytic Converter on a boat?