Cummins Onan 2.8HGJBB-1120 Gas RV Generator

Standard features
• Cummins Onan sound-attenuating enclosure
• Focalized mounting system with vibration isolators
• Cross-flow cooling
• Sheet steel drip controlling base
• Enclosed muffler
• Integral USDA Forest Service approved spark arrestor muffler
• Adjustable mechanical governor
• Automatic choke
• Overhead cam
• Single-side service
• Low oil level shutdown
• Electric fuel pump (gasoline
• Mounted control panel
• Sealed remote start connector
• Electric start
• Fused DC circuits to protect set wiring and remote control wiring
• Magnetic circuit breaker
• 50 in (1.3 m) generator set output leads
• Solid-state ignition
• Standard onboard diagnostic capability
Engine details
Model: EX 21
Design: 4-cycle, single cylinder, OHC
Displacement: 13.2 in3 (217 cm3)
Compression ratio: 8.5:1
Power: 7.0 bhp (max) at 3600 r/min
Cooling: Pressurized air
Cooling air volume: Includes engine cooling air volume
60 Hz: 300 ft3/m (8.5 m3/min) at 3600 r/min

Fuel system: (Gasoline) electric fuel pump, fuel lift 3 ft (914 mm)automatic choke Combustion air:
60 Hz: 12.5 ft3/m (0.35 m3/min) at 3600 r/min

Ignition system: Breakerless, electronic
Starting system: Remote, 12 V, 3-wire negative ground; start-stop rocker switch on control; connector for remote start cable
Lubrication: Splash lubrication
Oil capacity: 0.6 qt (0.63 L)
Cylinder crankcase: Alloy aluminum with iron cylinder liner cast into the block
Oil base: Aluminum
Cylinder head: Alloy aluminum, removable
Average fuel consumption
Gasoline
No load
Half load
Full load
60 Hz
0.2 Gal/h (0.8 L/h)
0.4 Gal/h (1.3 L/h)
0.5 Gal/h (1.7 L/h)

Air conditioner operation:
2.8kW generator set will start and run one 13500 Btu high efficiency air conditioner(15.5 Amps or less) plus 600 watt base load with an additional 300 watts of power available.
2.5kW generator set will start and run one 13500 Btu high efficiency air conditioner (15.5 Amps or less) plus a 600 watt base load with no additional watts of power available.
2.0kW generator set will start and run one 7800 Btu high efficiency air conditioner(5.5 Amps or less) plus 600 watt base load with an additional 100 watts of power available.
Voltage regulation: Exceeds requirements of ANSI/RVIA EGS-1 ±10%
Frequency regulation: Exceeds requirements of ANSI/RVIA EGS-1 ± 5%

Weight, size and sound level
Weight: 125 lbs (57 kg)
Size: Length 22 in (560 mm), width 16.3 in (415 mm), height 12.8 in (325 mm)
Sound: 70 dB(A) readings at 10 ft (3 m) half load
• Meets National Park Service sound level requirements (60 dB(A) @ 50 ft) for use in national parks.
• Typical installation will further reduce sound level.