Don't worry about the fluids. They can be changed later. Make sure fluid levels are ok, though.
Do bring a big wrench and rotate each engine a few turns before doing any start attempt.
Try to get some water to the sea water pump as its impeller is likely dry, it will shred if run dry. Other than that you can idle the engines without raw water flow for a minute or so. Long enough to know if they are poop or not.
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