Indmar Marine Engines
ShipbuildingTennessee, United States11-50 Employees
Indmar Marine Engines is a U.S.-based shipbuilding company located in Millington, Tennessee, with distribution and service centers across the United States. It is the world's largest privately held manufacturer of gasoline-powered inboard marine engines, with a history spanning more than four decades and a track record of innovation, including early adoption of fuel injection, tailored engine calibration, and catalyzed exhaust systems that set industry standards. The company operates advanced manufacturing facilities in the United States to serve a market that values high-performance, reliable inboard propulsion. In 2026, Indmar introduced a hybrid propulsion system for wakesurf boats, delivering 120 kW of on-board charging power and 830 total system horsepower (530 direct-to-shaft). The company has earned consecutive NMMA CSI awards for customer satisfaction, most recently its twenty-third in 2025, and it participates in local community initiatives such as the annual cleanup day in Millington.