The U.S. Coast Guard is seeking a contractor to repair continuous rear main seal leaks on both main diesel engines of the 49406 BUSL vessel, which must be hauled out of water for the work. The contractor must provide all tools, supplies, and labor, with no assistance from Coast Guard personnel, and will need to troubleshoot, source parts, and likely move reduction gears to access the seals. Performance will take place at IPF Boston, 476 Hanover St Exd, Boston, MA 02109, during standard business hours (0700-1600, Monday-Friday), with possible weekend or holiday work. The contract is a firm fixed price purchase order set aside for small businesses, with evaluation based on technical capability, past performance, and price. No specific budget amount or submission timeline is provided in the description.