Requires a 16 to 18 HP engine, turns at up to 3600 RPM. This two-bearing, belt-driven generator puts out 79 Amps at 120 Volts and 40 Amps at 240 Volts. Has two 120 Volt, 20 Amp duplex receptacles, one 120 Volt, 30 Amp locking plug receptacle and one 240 Volt, 50 Amp locking plug receptacle. All copper windings. Waterproof housing. HP: Requires 16 or above, Rated Watts (kW): 9,500, Surge Watts (kW): 10,000, Volts: 120 / 240, Amps: 79 / 40, Phase: Single, Enclosure: No, Safety Alerts: Thermal Overload, Dimensions L x W x H (in.): 16 x 12 x 11