Cummins Onan QG 4000 CARB Compliant Generator – A073X541

Cummins Onan QG 4000 Gasoline RV Generator | Model 4.0HGLBA-8306 | Item A073X541 | 4.0kW | 120V | CARB Compliant

The Cummins Onan QG 4000 Gasoline RV Generator (Model 4.0HGLBA-8306, Item A073X541) is a permanently installed 4,000-watt generator designed to provide dependable onboard power for motorhomes, travel trailers, fifth wheels, toy haulers, and truck campers. Producing 4,000 watts of reliable 120-volt power, this CARB-compliant generator delivers the performance needed to operate RV air conditioners, microwaves, battery chargers, lighting, entertainment systems, and other essential appliances whether you're camping off-grid or traveling across the country.

Designed specifically for recreational vehicles, the QG 4000 combines dependable gasoline performance with Cummins Onan's proven engineering and compact installation footprint. Its CARB-compliant design makes it an excellent choice for RV owners who frequently travel through California and other states that recognize California Air Resources Board emissions standards while still providing the reliable power expected from one of the most trusted names in onboard RV generators.

Whether you're replacing an older generator or equipping a new RV, the Cummins Onan QG 4000 delivers dependable starting, stable electrical output, and long service life for years of worry-free travel.

Key Features

• 4,000 watts (4.0kW) continuous power output
• 120V single-phase electrical output
• 60 Hz operation
• Gasoline-powered engine
• CARB-compliant emissions
• Designed specifically for permanently installed RV applications
• Compact footprint for easier installation
• Reliable electric starting system
• Stable electrical output for RV appliances and electronics
• 30-amp circuit breaker protection
• Excellent replacement for compatible Onan gasoline generators
• Built by Cummins Onan for dependable long-term performance

Technical Specifications

• Manufacturer: Cummins Onan
• Series: QG 4000 Gasoline
• Item Number: A073X541
• Model Number: 4.0HGLBA-8306
• Running Wattage: 4,000 Watts (4.0kW)
• Voltage: 120V
• Frequency: 60 Hz
• Phase: Single Phase
• Rated Current: 33.3 Amps
• Circuit Breaker: 30 Amp
• Fuel Type: Gasoline
• Cooling System: Air Cooled
• Starting System: Electric Start
• Emissions: CARB Compliant
• Dimensions (L × W × H): 30.0" × 19.7" × 14.4" (762 × 500 × 366 mm)
• Dry Weight: 178 lbs (81 kg)

What Can the QG 4000 Power?

With 4,000 watts of dependable output, the Cummins Onan QG 4000 can power many of the essential systems found in today's recreational vehicles, including:

• One 13,500 BTU or 15,000 BTU rooftop RV air conditioner
• RV refrigerator
• Microwave oven
• Coffee maker
• Battery charger and converter
• Television and entertainment systems
• Interior and exterior LED lighting
• Water pump
• Laptop computers and mobile devices
• Medical equipment
• Small kitchen appliances
• Additional everyday RV electrical loads

Ideal Applications

• Class A motorhomes
• Class C motorhomes
• Travel trailers
• Fifth wheels
• Toy haulers
• Truck campers
• Weekend camping trips
• Boondocking and off-grid camping
• Cross-country RV travel
• National park travel
• Replacement generator installations
• Full-time RV living

Why Choose the Cummins Onan QG 4000?

The Cummins Onan QG 4000 has earned a reputation as one of the most popular permanently installed RV generators because it delivers an excellent balance of power, reliability, and compact size. With 4,000 watts of continuous output, it provides enough power for many common RV electrical systems while remaining small enough to fit a wide range of motorhomes and towable RVs.

Its CARB-compliant design offers additional flexibility for RV owners who travel throughout the United States, including California and other emissions-regulated areas. Combined with dependable electric starting, stable electrical output, and durable construction, the QG 4000 is built for years of reliable service.

Whether you're replacing an older onboard generator or upgrading your RV's power system, the Cummins Onan QG 4000 provides dependable onboard electricity backed by decades of Cummins Onan engineering.

Why Choose a CARB-Compliant RV Generator?

CARB-compliant generators are designed to meet emissions standards established by the California Air Resources Board. Choosing a CARB-compliant generator helps ensure compatibility with emissions regulations in California and other jurisdictions while providing dependable onboard power for camping, travel, and off-grid adventures.

Replacement Generator Information

The Cummins Onan QG 4000 (Model 4.0HGLBA-8306, Item A073X541) is commonly selected as a replacement generator for compatible gasoline-powered RVs originally equipped with a Cummins Onan QG 4000 generator. Before replacing an existing generator, verify mounting dimensions, fuel connections, exhaust routing, electrical requirements, and overall application compatibility.

What's Included

• Cummins Onan QG 4000 Gasoline RV Generator
• Model 4.0HGLBA-8306
• Item Number A073X541
• Installation documentation
• Operator's manual
• Cummins manufacturer's limited warranty

Frequently Asked Questions

What fuel does the QG 4000 use?

The Cummins Onan QG 4000 operates exclusively on gasoline.

Can the QG 4000 run an RV air conditioner?

Yes. The generator is capable of powering one 13,500 BTU or 15,000 BTU rooftop RV air conditioner along with additional electrical loads depending on total power demand.

What does CARB compliant mean?

CARB compliance means the generator meets emissions standards established by the California Air Resources Board, making it suitable for use in California and other areas that recognize these standards.

Can this generator power sensitive electronics?

Yes. The generator provides stable electrical output suitable for televisions, battery chargers, computers, and many other electronic devices when properly installed.

Is this a good replacement for an older Onan generator?

Yes. The QG 4000 is one of the most popular replacement generators for compatible Cummins Onan gasoline-powered RV generators. Always verify installation compatibility before ordering.

Is professional installation recommended?

Yes. Professional installation is recommended to ensure proper fuel connections, ventilation, exhaust routing, electrical integration, and safe operation.

Who is this generator best suited for?

The Cummins Onan QG 4000 is ideal for owners of motorhomes, travel trailers, fifth wheels, truck campers, and toy haulers looking for dependable permanently installed gasoline power.

Why choose Cummins Onan?

Cummins Onan has been the industry leader in onboard RV generators for decades, offering dependable performance, durable construction, and nationwide service support.

Can this generator be used for off-grid camping?

Yes. The QG 4000 is specifically designed to provide dependable onboard electrical power whenever campground hookups or shore power are unavailable.

What makes the QG 4000 one of the most popular RV generators?

Its combination of 4,000 watts of reliable power, compact size, CARB-compliant design, dependable performance, and proven Cummins Onan reliability has made it one of the best-selling permanently installed RV generators for decades.