I have a 2001 65 hp bigfoot on a 50 ft houseboat. It runs great, but if I put it into reverese and run it up (2800 rpm max) for a few minutes, the overheat horn sounds.......I let it cool for 30 minutes or so and its fine. It has a new thermostat and impeller.....wordering what eles to check. Thanks for the help!
