The Marine Corps later upgraded UH-1E engines to the Lycoming T53-L-13, which produced 1,400 shp (1,000 kW), after the Army introduced the UH-1M and upgraded their UH-1C helicopters to the same engine.
O Corpo de Marines posteriormente actualizou os motores do UH-1E ao Lycoming T53-L-13, que producía 1 400 shp, despois de que o Exército introducise o UH-1M e actualizara os seus helicópteros UH-1C co mesmo motor.