Equipped with Arrow slow speed natural gas fueled engine with the following standard features: Thermal siphon cooling system with radiator and cooling fan Oil bath combustion air cleaner Full flow lube oil filtration Pressure lubrication throughout engine Starfire ignition Electrical engine speed governor (for AC units only) Safety switches for low oil pressure, low lube oil, low coolant level 12 volt electric ring gear starter Amp meter Reliable commercial external two bearing, brushless synchronous 60 hertz alternator available in either single-phase or three-phase (50 hertz on special order) Remote, mounted electrical control panel including voltmeter, amp meter, frequency meter and fuse block for control circuit protection Engine and alternator have V-belt and sheave drive connected together Engine and alternator are mounted together on 9" concrete filled base