Such a nice day in Oregon. Decided to try getting the boat out for the first time this year. Fired her up in the driveway and ran her for at least 15 minutes. Everything looked great. Took her down to the lake and put her in. Fired her up and the temp gauge continued to go up towards 240! Not sure what happened between the house and the lake. I have ordered a new thermostat. I'll check the impeller next and just hope that it's not the water pump. i had drained all of the water out for the winter and the boat is in the work shop for the winter. Will let you all know what I find. Any other ideas? Thanks - Peter