"Isuzu 4HV1NOGA01 - 79HP @ 1800 RPM - EMERGENCY STANDBY - HEAVY DUTY Natural GAS 4 Cylinder Power Unit - Complete with: Heavy Duty Design: Block, Crankshaft, Connecting Rods with DRY Replaceable Cylinder Liners, Electronic Fuel System, Radiator with constant torque clamps, Fan Guard, Radiator Hoses, Catalyst Muffler, Air Cleaner, Engine Support Legs, Bolt together Steel Skid, LCD Auto/Manual Control Panel, Oil & Fuel filters with 500 Hour Service Intervals, 12 Volt Electrics, High Output 140 Amp Alternator, Safety Shutdown System, SAE 3 Rear Housing, SAE 11.5""/10"" Combined Flywheel, Owner's Manual, and Shop Tested."