"Free & Clear's" twin 300-HP Yanmar diesels were installed
in 2000 and can now be considered "broken in" with only 775 hours

They are way more than broken in, more accurately, half used up or
possibly more. We are not talking about 3,000 lb cast iron engines
that are built to last forever. The Yanmars are lightweights that will
be lucky to make it much past 1,500 hours without major overhauls. The
fuel tanks, hull, deck and hull/deck joint should also be regarded as
highly suspect in a high usage boat of that age.