Cummins 6CTA8.3L Marine Propulsion Engine Rated at 350Hp @ 2600RPM S/n could not be found Approx 3500 hours since overhaul by Cummins dealer with all OEM parts paired with a TD MG507 w 2.54:1 ratio. Comes with air filter, exhaust elbow, wiring harness and wheelhouse gauge panel. Heat exchanger cooled. Running take out.