Join Date: Sep 2006
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1,000 hours really isn't much. If it were a road vehicle, running at (say) 60 mph, that would be about 60,000 miles.
Marine diesels will last longer too, as they are not gearchanging and throttling so much.
Change the oil regularly and you will be ok.
Try to keep your revs up, and try to avoid prolonged idling.