The U.S. Coast Guard is seeking sources for life-cycle support services for the FM-MAN 16V 28/33D STC Main Propulsion Diesel Engines (MPDEs) used on the Offshore Patrol Cutter (OPC) fleet. The anticipated contract is a single-award IDIQ with firm-fixed-price delivery orders, with a base period from April 1, 2027, to March 31, 2028, plus four one-year options. Services include OEM-authorized spare parts, depot-level overhaul of repairable components, technical support, and training, with performance location not specified. Respondents must demonstrate capability to support specific high-failure components and include an OEM authorization letter if not the original manufacturer. Responses are due by 14:00 EST on June 30, 2026, and no budget amount is specified.