It would depend if the sinking was in freshwater or salt. If fresh, I would continue; if salt, I would tread very carefully. In my experience, when a vessel has saltwater intrusion, it's a question of "when", not "if" there will be problems.
Questions I'd be asking:
- What are the specifics of the sinking?
- Wheat was replaced, and why was not all wiring replaced?
- What was done to safeguard the engine(s)? Fuel tanks? Bonding system?
- Who did the work? Their reputation?