The government seeks Caterpillar OEM-certified technical labor to perform comprehensive Diesel Engine Inspections on the Caterpillar 3512C port/starboard marine propulsion engines of Navy Yard Tugs YT-805 and YT-807, plus port and starboard heat exchanger overhaul for YT-807. The contract also requires authorized Caterpillar replacement parts, maintenance hardware, and spares for Yard Tugs YT-805, YT-806, and YT-807. This is a sole-source requirement posted for information only and is restricted to sources duly authorized to operate and do business in Japan; quoters may need to show ability to perform in Japan before award. Quotations must be submitted on an all-or-none basis, and partial or incomplete quotations are ineligible for award.