Cummins (onan Generators)

Cummins Onan: A Century of Reliable Power Generation

Few names carry as much weight in the power generation world as Cummins Onan. The story begins in 1920 when D.W. (David) Onan founded the Onan Corporation in Minneapolis, Minnesota, pioneering small engine-driven generators at a time when reliable electricity was the leading technology of the era. Over the following decades, Onan built one of the most respected distributor and service networks in the industry, earning a reputation for durability that outlasted countless competitors.

In 1986, Onan Corporation became a fully owned subsidiary of Cummins Inc., one of the world's largest designers and manufacturers of diesel and alternative fuel engines. Rather than diluting the Onan legacy, Cummins amplified it — bringing global engineering resources, deeper parts availability, and a worldwide certified dealer network to back every unit sold. Today, the Onan name lives on as a dedicated generator product line within the unified Cummins brand, particularly in the RV, marine, and standby power markets.

Purpose-Built Power for Every Application

What sets Cummins Onan apart is the breadth of its application coverage. Whether you need a compact genset for a weekend RV trip, a robust marine unit for life on the water, or a commercial standby system to protect a business, there is an Onan-engineered solution for the job. The Generator lineup spans from the popular QG series — the number-one RV generator brand in North America — all the way up to large commercial and marine sets exceeding 100 kW. Major motorhome and towable manufacturers factory-install Onan generators, a testament to the brand's reliability credentials.

Keeping these generators running at peak performance requires quality parts, and Cummins Onan delivers on that front too. The brand offers a comprehensive catalog of genuine replacement components engineered to exact OEM specifications. Fuel Parts & Accessories — including fuel pumps, fuel filters, and related fuel system hardware — are among the most frequently serviced components on any generator, and Cummins Onan's genuine parts are built to maximize output and extend service life. Similarly, External Engine Parts such as gaskets, belts, and ancillary components are engineered to OEM tolerances, ensuring a proper fit and long-term reliability.

For owners focused on routine upkeep and deeper repairs, the Generator Spare Parts selection covers everything from maintenance consumables like spark plugs, oil filters, and air filters, to more complex components like control boards and voltage regulators. And for commercial buyers or those seeking a complete new power solution, the Shop Generator category features heavy-duty Cummins Onan commercial and shop-grade gensets designed for demanding duty cycles.

Why Choose Genuine Cummins Onan Parts?

• OEM-Engineered Fit: Genuine Cummins parts are manufactured to exact product specifications, minimizing wear and maximizing generator lifespan.
• Broad Compatibility: Parts and accessories cover RV, marine, residential standby, and commercial generator sets across many model generations.
• Worldwide Support Network: Cummins Onan is backed by the largest worldwide certified distributor and dealer network in the generator industry.
• Proven Longevity: Over a century of engineering heritage means designs are continually refined based on real-world performance data.

Whether you are maintaining a QG series RV genset, servicing a marine unit, or sourcing components for a commercial standby system, Cummins Onan's extensive product catalog has the parts and generators to keep the power flowing reliably.