Another one mounted to the front of the Byron Pur-Pwr Muffler system. This one is to be used in the front of another one of my Byron Mustangs. Specifications for this engine are: 62cc (3.8 cu. in.) 73oz without muffler, 2,000 - 10,000 rpm. Unit burns a mixture of regular gas and oil mixed at 32:1. This unit also includes a C&H electronic ignition unit for improvrd starts and lower and more dependable idle.