Equipped with 47.6 hp Yanmar Tier IV-certified, turbocharged diesel engine with electronic throttle control, 5.5 metric ton Mustang 550Z includes ECO mode and auto deceleration features to save fuel. Boom offset swing of 68° in both directions allows for digging square hole without repositioning machine. To minimize backfilling time, excavator has angle blade with float that tilts 25° in either direction. Operator can select standard ISO or optional backhoe control pattern with turn of lever.