My 2021 400 ran hot on me several different times this weekend. Got as high as 230 f briefly. It triggered limp mode on me. It would quickly cool back down, though. It did this several times, and mostly when I was at idle speed. I cleaned the sea strainer, which was not bad at all, and the coolant level is fine. I don't really suspect an impeller issue because it goes up and down. I would think a bad impeller wouldn't cool back down. By the end of the day, it was pretty well maintaining temp at about 160-170 with no issues. I suspect the thermostat and plan on changing it to be safe. Have any of you changed out the thermostat on your raptor 400 or 450? If so, what thermostat did you use if not the official part offered by indmar for $232.00. LOL! They are nuts!

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