Techno impaired as in Wakeboardn cap o world on vac w family. Sounds like prob is intermittant but your ecm is getting info from a sensor or lack of info that sends it into limp mode. Could be a bad ground or connection that hits once things heat up or a bad sensor prob the former I would check all the wires from the temp sensors and get a schematic from Indmar. Also get a Mefi reader as looks like your on your own over there. I have not seen the you tube vid as I am on my phone. Just my .02