Question about marine diesels
Don has such great advice - especially about keeping spares onboard. Impellors and, to a lesser extent, belts, can be a headache to find on short notice and the damage done can be nixed or at least greatly reduced by having spares onboard. Oh, do pay attention to the raw water intake system.
And, unfortunately, I''ve found that even old, mistreated diesels on their last leg, the Volvo diesels esp., can be coaxed into using that last leg to get you home. So have faith in them if you treat them right.