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Onan 2,500-Watt Portable Inverter Generator - Gas - Manual Start
Cummins Onan

Onan 2,500-Watt Portable Inverter Generator - Gas - Manual Start

Part Number: CM66MR
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$784.00
Retail:$840.00
You Save: $56.00
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Need a simple, portable power option for camping? This inverter generator is lightweight, quiet, and easy to carry. It delivers clean power for electronics and runs for hours on a single tank, so you can stay powered without the noise. 1-800-940-8924 to order Cummins Onan generators part number CM66MR or order online at etrailer.com. Free expert support on all Cummins Onan products. Great prices and Fastest Shipping for Onan 2,500-Watt Portable Inverter Generator - Gas - Manual Start. Generators reviews from real customers.
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Cummins Onan Generators - CM66MR

  • Gas
  • Inverter
  • Portable Generator
  • Cummins Onan
  • 2001 - 3000 Watts
  • Electric Start
  • Recoil Start
  • 120V Output
  • Carbureted

Need a simple, portable power option for camping? This inverter generator is lightweight, quiet, and easy to carry. It delivers clean power for electronics and runs for hours on a single tank, so you can stay powered without the noise.


Highlights

  • Light Camping and Backup Power: 2,500 peak watts run chargers, lights, and small gear at camp or home.
  • Electronics Charging at Camp: Inverter output powers phones, tablets, and sensitive devices.
  • Quieter Campsite Power: 52 dBA operation keeps generator noise low around tents and picnic areas.
  • Carry-In Power for Camp: 48-lb body and built-in handle move from storage to your setup.
  • Runtime Checks at a Glance: LED display shows fuel, voltage, output, runtime, and total hours.
  • AC, DC, and USB Connections: 120V, 12V, and USB outlets power small appliances, 12V gear, and devices.

Features to know about

Simple Power for Camping and Light Backup

When you need dependable power without bringing a large generator, this portable inverter generator keeps things simple. It delivers 2,500 gasoline peak watts with 120V output, making it useful for camping, backup power, and light jobsite use where smaller equipment, chargers, and essentials need to stay running.

Clean Power for Electronics

Phones, tablets, and sensitive electronics need stable power, especially when you are away from standard outlets. Inverter technology helps deliver clean power, so you can charge and run sensitive devices with more confidence during camping trips, backup situations, or light-duty work.

Quiet Operation That Fits the Campsite


Onan portable generator

A generator should help your setup without overpowering the whole area with noise. This unit runs as low as 52 dBA, helping keep operating sound low while you charge electronics, power small gear, or keep essentials available nearby.

A Portable Design You Can Move Easily

Power is more useful when the generator is easy to bring along. At 48 lbs with a built-in carry handle, this generator is designed for easier transport, setup, and storage, whether you are packing for camp, moving it around the garage, or carrying it to a light-duty work area.

Outlet Options for Everyday Gear


Onan portable generator

Different devices need different connections, and this generator gives you several ways to plug in. The duplex 120V 20A AC outlet handles standard 120V loads, while the 12V 8A DC outlet and 2 USB ports support compatible 12V gear and USB-powered devices. Dust covers on the outlets help keep connections clean and protected between uses.

Runtime for Hours of Use

A 1-gallon fuel tank helps keep power available through long stretches of light to moderate demand. This generator can run up to 10 hours at 25 percent load and up to 8 hours at 50 percent load, giving you useful runtime for camping, charging, and backup power needs.

LED Display for Real-Time Status

Guessing how the generator is performing can slow you down. The LED display provides real-time monitoring of runtime, fuel level, voltage, power output, and total hours, so you can keep an eye on key information while the generator is running.

Specs

Power:

  • Gasoline peak watts: 2,500
  • Gasoline running amps: 2,200
  • AC frequency: 60 Hz
  • AC voltage: 120V
  • DC voltage: 5V
  • Peak amps at 120V: 20.8 amps
  • Running amps: 18.3 amps

Engine:

  • Engine horsepower: 3.4 HP
  • Engine RPM max: 5,500

Fuel and Runtime:

  • Fuel type: Gasoline
  • Fuel tank capacity: 1 gallon (3.8 L)
  • Runtime at 25 percent load: 10 hours
  • Runtime at 50 percent load: 8 hours

Outlets:

  • AC outlets: (1) Duplex 120V 20A (5-20R)
  • DC outlets: (1) 12V 8A outlet; (2) 5V USB ports

Dimensions and Weight:

  • Assembled dimensions: 19-3/4" long x 10-1/2" wide x 18-1/4" tall
  • Dry weight: 48 lbs

Operating Details:

  • Operational volume: As low as 52 dBA
  • Display: LED display for runtime, fuel level, voltage, power output, and total hours
  • Emissions: EPA

Design and Protection:

  • Design: Lightweight portable design with built-in carry handle
  • Outlet protection: Dust covers help keep outlets clean and protected

Warranty:

  • 3-Year residential warranty
  • 1-Year commercial warranty


A074Z433 Cummins Onan P2500i 2,500 Watt Generator with Inverter - Manual Start





Video of Onan 2,500-Watt Portable Inverter Generator - Gas - Manual Start
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of Cummins Onan Generators - Inverter 2500 Watt - CM66MR

Hi, everyone. Steven here with etrailer. Today we're taking a look at the Onan 2,500-Watt Portable Inverter Generator, and it runs on gas. Now, folks, this is gonna be a great option for you, whether you're off-grid in your RV, setting up a campsite, powering up your next outdoor tailgating adventure. This is the Cummins Onan's 2,500-Watt Generator, built to keep going. This is compact, as you can see, and it's gonna deliver 2,500 peak watts and 2,200 running watts, which should be more than enough power for those RV and camping essentials, whether it's small appliances, sensitive electronics like laptops, phones, and even CPAP machines.

Now it does have that built-in inverter, that's that clean technology that's gonna be coming through with low harmonic distortion, so you're gonna get safe, stable power that those sensitive electronics need. This only weighs about 48 pounds, so it's gonna be easy to carry and transport with the included built-in handle. And as you can see, coming around to the front, you got a couple of household plugin options, some USBs. You have an option here, it is set up for parallel connection, so maybe 2,500 watts isn't enough for you, you can buy a second one and a parallel kit, and then you can run these in parallel to give you that increased output that you're looking for. Or maybe in the future, you're growing your connections and stuff you need and you're growing in power usage, you can connect one later on.

And of course you got your digital data center here, which will give you everything you need from running hours, watts, and those kind of things. And then all your stats as far as low oil, you know, warnings and those kind of things. So really nice little unit. The gas of course, goes in the top here. You've got a maintenance panel here on the side.

You simply turn this to unlock, carefully pop it up and out, now I can access things like the air filter, you know, if I'm doing checks on the motor and stuff, I got the oil fill down here, you can't really see it. It slides up and out, and that's where the oil's gonna be going into and where I can check the oil and stuff. And then that just goes right back in place. That's got a little ribbon that holds it in place, so you wanna make sure that that is out of the way. There we go.

And then this will just literally go back in place. I find that if you start with the top first, give it a light little smack there, then I can pop it right back in with ease. Then of course on the back you got the quiet muffler there. Everything is a lot quieter just because of its size, and everything's in here and it's insulated. Of course, we got our off switch, run, and choke, and then your pull string here for starting it up. You also have a little 12-volt plug here as well, so I can plug this in and use that 12-volt outlet. I've got a funnel here for filling up the included oil. And when you need to change oil, you have that, and there is an included toolkit. All these generators come with this. There's basically just a little screwdriver in here and then your spark plug little wrench tool to get the spark plug in and out as well. Now, folks, again, inside of here is the 98-CC four-stroke engine, that's gonna give you that professional efficiency and give you up to 10 hours of runtime at 25% load on just one gallon of fuel. It also has an eco mode. It's gonna automatically adjust the engine speed to match your power consumption needs. That's gonna help you conserve fuel and just run longer based on your usage and everything. Well, folks, that's gonna wrap up our quick look together at this Onan 2,500-Watt Portable Inverter Generator. I'm Steven, thanks for watching.

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Info for this part was:

Employee Joshua S
Video Edited:
Joshua S
Employee Steven C
Installed by:
Steven C
Employee Matthew B
Installed by:
Matthew B
Employee Mary K
Edited by:
Mary K
Employee Alex H
Written by:
Alex H
Employee Cody B
Updated by:
Cody B
Employee Joshua U
Video by:
Joshua U

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