It must mean something otherwise marine engineers and yacht brokers would not use the term.We both think that "reconditioned" should mean more than a quick repair, but that's just our opinions, they mean nothing in the real World. The FER also think that the term "reconditioned" should have a clearly defined, legal definition. They have been trying to get that definition for decades, without success.
Your own position is a source of confusion, one day you claim the OP's flushed engine can be legitimately described as reconditioned, now a few days later I think you are saying it is a worthless term without meaning.