I want to make sure I understand my cooling system. It appears to be a closed system. Marine Power 496 Vortec 8100 with Dominator pump. I do regular maintenance on this every year and have never done anything to the cooling system. Runs 150* all the time. Now that's this is 9 years old with 138 hours if the system is closed I want to change the fluid. I see a water pump. At the jet where the pic shows the braided line this area is warm to touch when I pull the boat out of the water. How exactly does this system work? Where do I drain the system from and what do I replace it with?
19.4 KB Views: 102
14.2 KB Views: 95