We rebuilt a 1990 evinrude around about 2200hours, I think we got roughly 800-1000 hours after the rebuild before we noticed things were starting to break again and decided it was time to repower instead of rebuild again. It really depends on how well the engine was treated before the rebuild(maintenance and use) as well as how well the rebuild was done and how it was treated and used after. No engine will last the same amount but I would assume roughly 1000 hours. After that point we repowered with a 2000 200hp HPDI on our seafarer.