Cummins Onan QG 4000 Gasoline RV Generator | Model 4KYFA-6747 | Item A055E867 | 4.0kW | 120V
TheCummins Onan QG 4000 Gasoline RV Generator (Model 4KYFA-6747, Item A055E867)is one of the most popular permanently installed RV generators ever built, providing4,000 watts of dependable onboard powerfor motorhomes, travel trailers, fifth wheels, toy haulers, and truck campers. Designed specifically for recreational vehicles, the QG 4000 delivers reliable electricity for rooftop air conditioners, microwaves, battery chargers, lighting, televisions, refrigerators, and other essential RV appliances whether you're camping off-grid or traveling across the country.
Powered by gasoline, the Cummins Onan QG 4000 offers dependable starting, smooth electrical output, and long service life. Its compact design allows installation in a wide variety of RV generator compartments while maintaining the durability and reliability that have made Cummins Onan the industry's leading name in onboard RV generators for decades.
Whether you're replacing an older generator or equipping your RV for years of adventure, the QG 4000 provides dependable onboard electricity so you can enjoy the comforts of home wherever the road takes you.
Key Features
4,000 watts (4.0kW) continuous power output
120V single-phase electrical output
60 Hz operation
Gasoline-powered engine
Designed specifically for permanently installed RV applications
Reliable electric starting system
Air-cooled engine for dependable operation
Compact footprint for easier installation
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:A055E867
Model Number:4KYFA-6747
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
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 is capable of powering many of the essential electrical 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
Extended RV travel
Boondocking and off-grid camping
National park adventures
Replacement generator installations
Full-time RV living
Why Choose the Cummins Onan QG 4000?
The Cummins Onan QG 4000 has earned its reputation as one of the industry's most trusted RV generators by delivering dependable performance year after year. Its 4,000-watt output provides enough power for many common RV appliances and comfort systems while remaining compact enough to fit a wide range of recreational vehicles.
Designed exclusively for RV applications, the generator features dependable electric starting, durable construction, stable electrical output, and quiet operation that make it ideal for everything from weekend camping trips to full-time RV living. Whether you're camping without hookups or traveling cross-country, the QG 4000 delivers the reliable onboard electricity needed to enjoy the comforts of home.
For decades, RV manufacturers have trusted Cummins Onan generators as original equipment because of their reliability, nationwide service network, and long operating life.
Why Choose a Permanently Installed RV Generator?
A permanently installed RV generator provides immediate access to onboard electrical power without unloading portable equipment or carrying extension cords. With the push of a button, you can operate your RV's air conditioner, appliances, lighting, battery charger, and entertainment systems virtually anywhere your travels take you.
Replacement Generator Information
The Cummins Onan QG 4000 (Model 4KYFA-6747, Item A055E867) is commonly selected as a replacement generator for compatible gasoline-powered RVs originally equipped with a Cummins Onan QG 4000. 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 4KYFA-6747
Item Number A055E867
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 can power one 13,500- or 15,000-BTU rooftop RV air conditioner and support additional electrical loads, depending on the total power demand.
Can this generator power sensitive electronics?
Yes. The QG 4000 produces stable electrical output suitable for televisions, battery chargers, computers, medical equipment, and many other electronic devices when properly installed.
Is this generator suitable for off-grid camping?
Yes. The Cummins Onan QG 4000 is specifically designed to provide dependable onboard electrical power whenever campground hookups or shore power are unavailable.
Is this a good replacement for an older Onan generator?
Yes. The QG 4000 is one of the most common 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, toy haulers, and truck campers looking for dependable permanently installed onboard power.
Why choose Cummins Onan?
Cummins Onan has been the industry leader in onboard RV generators for decades, providing dependable performance, durable construction, and one of the largest service networks in North America.
How is this model different from the CARB-compliant version?
The A055E867 is the standard QG 4000 gasoline model, while certain other QG 4000 models are specifically certified to California Air Resources Board (CARB) emissions standards. Be sure to select the model that best matches your RV and your state's emissions requirements.
What makes the QG 4000 one of the best-selling RV generators?
Its combination of 4,000 watts of reliable power, compact size, dependable starting, proven durability, and decades of Cummins Onan engineering has made the QG 4000 one of the most trusted permanently installed RV generators available.
Product Literature
Download the Cummins Onan QG 4000 RV Generator Brochure
Download the Official Cummins Onan QG 4000 Specification Sheet