Product Features
Engine
• Natural gas/propane
• Engine air cleaner
• Engine oil (Synthetic)
• Oil drain extension tube
• Low oil pressure shutdown
Fuel System
• Single fuel – natural gas or propane vapor, field selectable
(Set to Natural gas from factory)
Alternator
• 60 Hz, 1 phase, < 5% THD (total harmonic distortion)
• Long life electrographic DC brushes
• Slip ring heater
Control
• Display language – English
• Under hood built in display
Electrical
• Single 100A circuit breaker, UL certified
(On all models)
• Battery charging alternator
• Battery charger – 4 Amps
Cooling
• Single direct drive blower
Enclosure
• Aluminum exterior, galvanized steel interior
• Evaluated to withstand 180 mph wind loads in accordance
with ASCE7-10
Code Compliance
• UL 2200
• CSA 22.2 and B149.1
• EPA emissions
• NFPA 37 – 18 inches
Warranty
Base: 5 years / 2000 hours
Extended warranties available
Generator Set performance
Voltage regulation, no load to full load: ±1.25%
Steady state voltage variation: ±1.25%
Frequency regulation: Isochronous
Motor starting kVA (30% voltage dip): 40 for RS20A/AC,
34 for RS17A, and 26 for RS13A
Steady state freq. variation: ±1.25% (±1.5% @ No load)
Operating temperature: 122 °F (50 °C) to -40 °F (-40 °C)
See Accessories section for details on kits
Engine Specifications
Model: QSJ999G
Design: Naturally aspirated, V twin air cooled
Bore: 3.54 in (89.9 mm)
Stroke: 3.09 in (78.5 mm)
Displacement: 60.96 inch3 (999 CC)
Cylinder block: Aluminum
Battery capacity: Group 51R, 450 CCA at ambient
temperature of 32 °F (0 °C)
Starting voltage: 12 Volt, negative ground
Oil Filter type: Spin-on
Rated speed: 3600 rpm
Fuel Supply Pressure
Minimum - in H2O (kPa):
NG - 3.5 (0.87) / LP - 6.0 (1.49)
Maximum - in H2O (kPa):
NG - 12.0 (3.0) / LP - 12.0 (3.0)
![](https://cdn.shopify.com/s/files/1/0751/3885/9282/files/2023-10-1308_59_51-CumminsAirCooledHSBSpecSheet.pdf-AdobeAcrobatReader_64-bit_480x480.png?v=1697202037)
Recommended Additions
1. Cummins Onan RA Series Automatic Transfer Switches (sold separately)
2. Requires a Group 51R 450 CCA Battery (sold separately)
3. Generator Pad (sold separately)