Question about a 454 7.4 mpi mercruiser. Looking at a boat and the current owner sucked up sand and overheated the engine to 245. Boat mechanic checked the compressions and they came back between 165-175psi. The mechanic replaced the whole exhaust, rider gaskets, seawater pump etc. plus flushed the engine cooling system of remaining sand. Mechanic took it out and said it was running awesome. I guess I'm wondering if I should be worried about anything in the engine itself with the temperature it got too?

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