I just purchased this boat with twin 5.0 L MPI Mercruisers. The previous owner told me it has a closed cooling system, but I now can't tell if it actually does. The seller said the heat exchangers are on the right-hand bottom side of each engine. I'm really not very mechanical, but I can't find anything on the internet that depicts a closed cooling system on the bottom right side of an engine. Everything I see on google images shows the heat exchanger right up top in front of the engine.
Does es anyone else have a closed cooling set-up like I'm describing?