Natural Gas Generator Set Number 20502 Cat Engine Model G3516 SITA SN 3RC0089,1085HP The drivers are V-16, Spark ignition, Turbo charged and after cooled. These machines have been serviced by the OEM since start up and until shut down Operating speed 1200RPMs 4 wire, Exciter 27V/80A, max temperature rise 115°C by resistance. Paired with a vertical heat exchanger 5’3”diax12’H