Hello All. Cooler is in the water! Launched yesterday. After installing the run dry impellers, I did get the port engine up to 220 at launch. Apparently an air lock in water system. The mechanic bled out some air in the intake hose, and then temp recovered. Still not where it should be, running at 180, but mechanic is going to replace thermostats. Feels like the old one may have crapped out when the engine got hot. Glad I had the run dry impellers in there, a standard impeller would have been in trouble spinning without water. Starboard engine ran 10 degrees cooler than previous at 150. Hope all is OK with the port engine. Did not trip thermo-breaker. er