Hi,
I had a V504-M, almost the same engine,. Installed new, new boat.
Rated 197@3000 intermittent (8 hours out of 24)
No work needed on engine, only raw water pump, heat ex-changer, and maybe the alternator(memory?).
Was still running fine when I sold it with 10,000 hours.
take this for what it's worth to you.
Ted
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