Still haven’t solved my overheating issue. Replaced both the fresh water impeller and the thermostat. Not sure where to go now. After replacing the thermostat and topping up the coolant, I brought the engine up to temperature, it shot right past 160 and I shut it down at 180. At around 160 I expected to see the coolant reservoir level to drop, as I am suspecting that I still need to add more coolant, but it didn’t go down. Anybody have any ideas what might be happening?