The Department of Defense, specifically the Navy, is seeking proposals for the Small Business Innovation Research (SBIR) program to develop a modified four-stroke commercial off-the-shelf (COTS) outboard engine for the Marine Corps Enhanced Combat Rubber Raiding Craft (E-CRRC). The objective is to create an engine that meets stringent performance requirements, including the ability to propel the E-CRRC at 18 knots while carrying a payload of 2,400 lbs, and to restart after immersion in water. This initiative is critical as the current two-stroke engines are no longer produced in the U.S., leading to challenges in reliability and compliance with environmental regulations. Proposals for Phase I are due by May 21, 2025, with the opportunity to transition to Phase II for prototype development and potential Phase III for manufacturing. Interested parties can find more information and submit proposals through the official SBIR website.