"Zenith ZPP690 9.0L - 180HP @ 2200 RPM - PRIME - EPA Certified - Industrial LPG/Natural Gas - 6 Cylinder Power Unit Complete with: Electronic Fuel System, Radiator, Fan Guard, Radiator Hoses, Muffler/Catalyst, Air Cleaner, Front and Rear Engine Support Legs, Auto/Manual Start Control Panel with Key Switch, Safety Shutdown System, Throttle, Oil and Fuel Filters, 12 Volt Electrics, SAE 2"" Rear Housing/ SAE 11.5"" Flywheel, Owner's Manual, and Shop Tested."