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Review of the Champion 100307 Gasoline Portable Generator

4375 Starting Watts, 3500 Running Watts on Gasoline
3147 Starting Watts, 3950 Running Watts on Propane
Electric Start: No
Weight: 104.9lbs
Noise: 68dB
Champion 100307

Should You Buy It?

Based on buyer feedback, we think you can buy this generator with confidence. It's fairly powerful and has the versatility of dual fuel. Although we shouldn't overstate this, your machine may arrive damaged because of poor handling in transit. So it's important to check the state of the box on delivery and then look for poor welds after removing the unit to see if any have become loose.

As a lot of reviewers note the difficulties of moving the generator around without the optional wheel kit, you may want to add it to your shopping list too.

Key Points about the Champion 100307

5-stars from most owners
Dual Fuel versatility
Light weight and compact
Life-Time Technical Support
Quality control
No wheel kit as standard
No Fuel Gauge
Below you will find more information on the features of this model.

Overview of the Generator

The Champion 100307 is a versatile dual fuel generator designed for RVs, jobsites, and home backup of basic essential appliances during emergencies and power outages. It's powerful enough to start and run an RV's 15000 BTU air conditioner. 

Controls and Features

As with all of Champion's generators, this model includes Cold Start Technology to help make starting easier in cold weather. 

To protect the engine, a sensor detects low oil levels and automatically shuts it down. It won't run again until it has the right amount of oil. 

The unit is CARB compliant and EPA Certified, meaning it can be used in all 50 states, including California. 

The generator does not have an electric starter, but a manual easy to pull recoil cord. Nor does it have a fuel gauge or an Eco Mode (the latter is only available on inverter generators).

This model incorporates a feature Champion call Volt Guard™. This is a built-in surge protector to help prevent overloads and ensure your connected equipment, such as TVs, computers, your appliances, remain safe. The standard THD rating is 15% or less under load. But if you need to connect sensitive electronics, Champion recommend you use a line conditioner, or consider choosing an inverter generator, such as their model 100574.

If you intend to operate the generator at higher altitudes Champion can provide a high-altitude carburetor main jet. You will need this because engine power and generator output reduce by about 3½ percent for every 1000 feet above sea level. Champion's Technical Support Team can give you instructions on how to install it. You can also read some important information here about operating a portable generator at altitude. 

For more detailed information on the 100307 have a look at the manual here.

Be warned, this generator does not have a carbon monoxide (CO) sensor.

Power Output

A 224cc Champion engine powers the generator produces 4375 starting watts and 3500 running watts when using gasoline. It runs for up to 9 hours at 50% load on its 3.4-gallon fuel tank.

On propane, it outputs 3950 starting watts and 3150 running watts. With a 20lb propane tank, it lasts for up to 10.5 hours at 50% load. Champion supply as standard a 3.3-foot propane hose with a built-in regulator.

Switching safely between gasoline and propane is as simple as turning the dedicated selector.

This model is NOT parallel capable. If you plan on connecting any sensitive electronics, the advice is to use a line conditioner/UPS to protect against surges in voltage that will cause damage


Weighing in at 110lbs you won't want to lift this generator on your own. And you will want to get the optional wheel kit to move it around more easily.

Noise Level

With a sound level of 68dB at 23 feet this generator is moderately quiet. But bear in mind that noise levels are subjective, and our individual perceptions and acceptance of noise can vary quite a lot.

What Most Buyers Like

Most buyers give this model 4 and 5-star reviews and recommend it to other potential customers. The majority like the quality of the product, even though a few others haven't been so impressed.

Most, but not all, buyers have found customer service to be fast, positive, and responsive.

One owner comments that this model may not be a big power house generator, but it's more than adequate for a small household, and the price can't be beaten.

What Some Buyers Like Less

Some customers are not happy with the use of cheap plastic and poor frame welds on their units.

Buyers are warned that this is a bulky and heavy generator. One young and fit man said it's too big to move around by hand. And being a heavy machine, poor packaging may have been the cause of a few units being damaged in transit. But where the box did arrive intact, some customers suggest any damage might be a result of quality control problems at the factory.

The wheel kit is essential and should be included with the generator as a standard fitting.

Some buyers found their units to be much louder than claimed, while others say the sound level is as advertised. 

A few owners say the customer support they received was not what they expected.
TechnologyDual Fuel Inverter
Gasoline Starting Watts4375W
Gasoline Running Watts3500W
Propane Starting Watts3950W
Propane Running Watts3150W
Gasoline Starting Amps at 120V36.5A
Gasoline Running Amps at 120V29.2A
Propane Starting Amps at 120V32.9A
Propane Running Amps at 120V26.3A
Outlets120V 30A Locking (L5-30R)
120V 30A (TT-30R)
120V 20A Duplex (5-20R)
GFCI OutletsNo
Covered OutletsNo
Covered Circuit BreakersNo
Gasoline Run Time at 1/2 Load9.0 hours
Propane Run Time at 1/2 Load10.5 hours
Noise Level dB68
Parallel CapabilityNo
DC OperationNo
Automatic Voltage RegulationYes
Start TypeRecoil
Engine BrandChampion
Engine Size224cc
Engine Type4-stroke
Engine Speed3600
Fuel TypeGasoline, Propane (LPG)
Fuel GaugeNo
Gasoline Capacity3.4 gallons
Gasoline Tank MaterialSteel
Engine Oil Type10W-30
Engine Oil Capacity0.6 qt.
Engine Oil IncludedNo
Low Oil Shut-OffYes
PGMA G300-2018 CompliantNo
EPA CertifiedYes
CARB CompliantYes
Length23.2 in.
Width19.1 in.
Height20.0 in.