Re: Overheat alarm on Pa-in-law’s Evinrude?

[Don]

Well, those things are designed to run fairly warm/hot at idle…Have you checked engine temp while it is idling with the alarm on?
That engine does not have any of the fancy alarm signals, or fancy self test horn (unless someone has replaced the horn), so it seems doubtful that it is a false warning signal. Probably time for a new impeller and thermostat change.