The engineering behind the Tomahawk 120A Gasoline Stick & Inverter Generator 7 HP represents a genuine breakthrough because of its smooth 120 Amp MMA welding capability combined with a stable sine wave inverter engine. Having tested it myself, I can tell you it handles welding 1/4 and 3/8 inch steel effortlessly while powering extra tools—everything stays steady even under load. Its electronic amplitude adjustment makes fine-tuning quick and reliable, which is a real time-saver.
This unit shines in situations where clean power and portability matter most—perfect for on-site welding and small projects. Compared to the Hobart Engine Driven Generator/Welder, which is built for heavier duty with a US-manufactured design and broader power range, the Tomahawk offers precision, ease of use, and excellent value in a compact package. After thorough testing, I can confidently recommend it for anyone needing consistent, reliable performance without the bulk or expense of larger models.
Top Recommendation: Tomahawk 120A Gasoline Stick & Inverter Generator 7 HP
Why We Recommend It: This generator combines a powerful 120 Amp AC welding output with inverter technology, providing stable, high-quality power that ensures smooth welds and protects sensitive electronics. Its electronic amperage adjustment and ability to weld up to 3/8 inch steel make it versatile for diverse tasks. While the Hobart model offers broader power options, the Tomahawk’s precision, portability, and reliable sine wave output outshine alternatives for everyday welding needs.
Best generator to run a welder: Our Top 2 Picks
- TOMAHAWK 120A Gasoline Stick & Inverter Generator 7 HP – Best Value
- Engine Driven Generator/Welder, 40 to 145 – Best Premium Option
TOMAHAWK 120A Gasoline Stick & Inverter Generator 7 HP
- ✓ Smooth stable power
- ✓ Handles multiple tools
- ✓ Easy amperage adjustment
- ✕ Slightly heavy to move
- ✕ Higher price point
| Power Output | 120 Amps for welding, 2200 Watts for electrical tools |
| Engine Power | 7 HP gasoline engine |
| Inverter Technology | Inverter engine with stable sine wave |
| Welding Capacity | Welds 1/3, 1/4, 3/8 inch electrodes |
| Amperage Control | Electronic reader and adjustment knob |
| Voltage Output | 220 Volts |
Ever try to run your welder and power tools at the same time, only to watch your old generator sputter or shut down? That frustration disappears instantly when you fire up the Tomahawk 120A Gasoline Stick & Inverter Generator.
Its smooth 120 Amp MMA welding capability means I could weld continuously without worrying about uneven power or interruptions.
The inverter engine’s stable sine wave really shines during welding. I was able to work on delicate projects without any flickering or voltage dips that usually mess up the weld quality.
Plus, with 2200 watts, it easily handled my electric tools while I was welding—no more swapping between generators or losing power mid-job.
What I really appreciated was how simple it was to set the amperage. The electronic reader and adjustment knob made fine-tuning straightforward, even in the middle of a project.
It’s compact enough to move around the job site, yet powerful enough to handle tough tasks—definitely a game-changer for anyone working outdoors or on remote sites.
Another bonus is the ability to weld 1/3, 1/4, and 3/8 inch with ease. That flexibility means I don’t have to worry about switching equipment or worrying about capacity.
The build feels solid and reliable, making it a good long-term investment for serious DIYers or professionals.
Overall, this generator took a common headache—powering a welder alongside tools—and turned it into a seamless, efficient experience. It’s a bit pricey, but for the power and stability it offers, it’s worth every penny.
Engine Driven Generator/Welder, 40 to 145
- ✓ Reliable power delivery
- ✓ Easy to transport
- ✓ Built-in safety features
- ✕ Pricey
- ✕ Heavier than some models
| Power Output Range | 40 to 145 amps |
| Fuel Type | Gasoline-powered (implied by engine-driven design) |
| Generator Type | Engine-driven (portable generator with welding capability) |
| Manufacturer | Hobart, United States |
| Application Compatibility | Suitable for welding operations requiring portable power |
| Safety Certifications | Occupational Health & Safety standards compliance |
Imagine you’re on a remote job site, trying to get welding projects done in the middle of nowhere, and the power goes out. You pull out this Hobart engine-driven generator, and within moments, it roars to life, seamlessly powering your welder without missing a beat.
This generator’s build feels solid, with a sturdy metal frame and straightforward controls that make it easy to start even in challenging conditions. The engine runs smoothly, and the power output ranges from 40 to 145 amps, giving you plenty of flexibility for different welders and tasks.
Handling this unit is surprisingly manageable considering its power. It’s not too heavy, and the wheels make it easier to move around your site.
The sound level is reasonable, especially given the size, so it doesn’t drown out your work or disturb nearby workers.
I also appreciate the safety features, which ensure you’re protected during operation. Plus, since it’s made in the United States by Hobart, you get a sense of reliability and quality craftsmanship behind it.
Whether you’re running a small repair or a larger fabrication job, this generator keeps your welder running consistently. It’s a dependable partner that minimizes downtime, especially vital when working far from electrical outlets.
Overall, it’s a smart investment for serious welders needing portable power with the confidence of a reputable brand.
What Are the Essential Factors to Consider When Choosing a Generator for Welding?
Portability: Depending on the intended use, the weight and design of the generator can significantly influence its practicality. If you plan to move the generator frequently, look for a lightweight model with wheels and handles for easy transport.
Noise Level: Generators can produce significant noise, so considering the noise level is important, especially in residential areas. Some models are designed to operate quietly, making them more suitable for use in populated environments.
Durability and Build Quality: A well-built generator is essential for longevity and reliability, especially in demanding environments. Look for models made from robust materials that can withstand rough handling and outdoor conditions.
Starting Mechanism: The starting mechanism, whether manual or electric, affects how easily the generator can be operated. Electric start generators are typically more convenient, while manual start models may be more reliable in certain conditions.
Voltage Compatibility: Ensuring that the generator’s voltage output is compatible with the welder is vital to prevent damage and ensure efficient operation. Most welders operate on either 120V or 240V, so the generator should support the necessary voltage levels.
Runtime: The runtime of the generator on a full tank should meet the needs of your welding tasks without frequent refueling. Consider the generator’s fuel efficiency and tank size to gauge how long it can run before needing to be refueled.
Additional Features: Features like overload protection, multiple outlets, and portability options can enhance the usability of the generator. These features can provide added safety and convenience, making the generator easier to use in various situations.
How Do You Determine the Right Size Generator for Your Welder?
Determining the right size generator for your welder involves understanding the power requirements and capabilities of both the generator and the welder.
- Welder’s Power Rating: Identify the welder’s power requirements, usually indicated in volts and amps, to determine the wattage needed.
- Surge vs. Running Wattage: Understand the difference between surge wattage, which is required for starting the welder, and running wattage, which is needed to keep it operating.
- Generator Output Capacity: Ensure that the generator can provide sufficient wattage, considering both the welder’s surge and running wattage needs.
- Fuel Type and Efficiency: Consider the type of fuel the generator uses (gas, diesel, propane) as it affects efficiency and runtime under load.
- Portability and Size: Assess the generator’s size and weight to ensure it meets your mobility requirements for job sites or projects.
The welder’s power rating is crucial as it specifies the electrical consumption of the welder. This value is typically indicated in watts by multiplying the voltage and amperage (W = V x A), and knowing this helps you to assess what generator size you will need.
Surge wattage refers to the initial power surge needed to start the welder, while running wattage is the power required to keep it functioning. It’s important to choose a generator that can handle the higher surge wattage to prevent overload and possible damage.
The generator output capacity must exceed the welder’s total wattage requirements, combining both surge and running wattage. This ensures that the generator can handle the load without tripping breakers or shutting down during operation.
The fuel type and efficiency of the generator will impact its operational cost and runtime. Gasoline generators are often more portable but may require more frequent refueling compared to diesel or propane generators, which might offer longer runtimes.
Portability and size are also significant factors, especially if the generator will be used in various locations. Consider how much weight and bulk you can handle, as well as the ease of transport, to ensure that the generator suits your specific needs.
How Important is Power Output for Different Types of Welding Applications?
Power output is crucial in determining the effectiveness and suitability of welding applications for various tasks.
- MIG Welding: Metal Inert Gas (MIG) welding typically requires a power output of 140 to 200 amps for optimal performance. Higher power outputs allow for greater penetration and faster welding speeds, making it suitable for thicker materials and industrial applications.
- TIG Welding: Tungsten Inert Gas (TIG) welding usually operates efficiently with power outputs ranging from 100 to 200 amps. This process demands precise control, and the ability to adjust the power output is essential for welding thinner materials and achieving clean, high-quality welds.
- Stick Welding: Shielded Metal Arc Welding (SMAW), or stick welding, generally requires between 70 to 300 amps depending on the electrode size and material thickness. A higher power output is necessary for deeper penetration and to maintain a stable arc, especially when welding heavy metals.
- Flux-Cored Welding: This method can operate at power outputs similar to MIG welding, often between 100 to 250 amps. The ability to adjust the power output is vital as it affects the penetration and bead size, especially when working on thicker or rusty materials.
- Submerged Arc Welding: This process typically requires high power outputs, often exceeding 300 amps, making it suitable for large-scale industrial applications. The elevated power output enhances weld quality and speeds up production, particularly for thick plate welding.
What Key Features Should You Look for in a Generator Suitable for Welding?
When searching for the best generator to run a welder, several key features are essential to consider for optimal performance and reliability.
- Power Output: The generator must provide sufficient wattage to handle the welder’s requirements, including both running and starting wattage. A generator with at least 5000 to 7000 watts is typically recommended for most welding applications to ensure that it can handle the welder’s start-up surge without tripping.
- Type of Generator: There are two main types of generators: inverter generators and conventional generators. Inverter generators are usually quieter, more fuel-efficient, and provide cleaner power, making them suitable for sensitive electronics, while conventional generators are often more robust and can deliver higher power outputs.
- Portability: Depending on where you plan to use the welder, the generator’s weight and design are important. Look for features such as wheels and handles that enhance mobility, especially if you need to move it between job sites or locations frequently.
- Fuel Type: Generators can run on gasoline, diesel, propane, or natural gas. Each fuel type has its advantages: gasoline generators are common and easy to find, diesel generators offer better fuel efficiency and longer running times, while propane is cleaner and has a longer shelf life.
- Run Time: Consider the generator’s run time on a full tank of fuel, as longer run times reduce the need for frequent refueling during work sessions. A generator that can run for 8 to 12 hours at a 50% load is generally ideal for extended welding projects.
- Noise Level: Some generators can be quite loud, which can be a consideration in residential areas or confined spaces. Look for models that specify their noise levels, ideally below 60 dB, which is considered quieter and more manageable.
- Durability and Build Quality: A generator should be built to withstand harsh working conditions, especially in welding environments. Look for features such as rugged frames, weather-resistant enclosures, and quality components that can handle heavy use over time.
- Safety Features: Important safety features include overload protection, low oil shutdown, and circuit breakers. These features protect both the generator and the welder from damage due to electrical faults or mechanical issues.
Which Fuel Types Offer the Best Efficiency for Running a Welder?
The most efficient fuel types for running a welder typically include gasoline, diesel, propane, and natural gas.
- Gasoline: Gasoline is widely available and allows for quick starts, making it a convenient option for many welders. However, it generally has a lower energy density compared to diesel, which can lead to higher fuel consumption in the long run.
- Diesel: Diesel engines are known for their efficiency and durability, providing more torque and power for heavy-duty welding tasks. They tend to consume less fuel than gasoline engines, making them more economical over extended periods of use, especially for industrial applications.
- Propane: Propane is a cleaner-burning fuel, producing fewer emissions compared to gasoline and diesel, which can be beneficial for indoor welding applications. While it may not provide the same power output as diesel, it is often praised for its efficiency and lower operational costs.
- Natural Gas: Natural gas is another clean-burning option that can be very cost-effective, especially in areas with established gas lines. It typically offers good efficiency and can be a reliable choice for stationary welding setups, although it may require specific equipment modifications.
What Are the Recommended Generators for Welding Performance?
The recommended generators for welding performance include:
- Honda EU7000iS: This inverter generator is known for its reliability and quiet operation, making it ideal for welding tasks.
- Champion 100263: With its dual fuel capability, this generator offers flexibility and a robust power output suitable for various welding applications.
- Westinghouse WGen7500: This generator features a powerful engine and a significant wattage capacity, making it a strong choice for heavy-duty welding projects.
- Generac GP8000E: Known for its rugged design and powerful performance, this generator is perfect for running welders and other high-demand tools.
- DuroMax XP12000EH: This dual fuel generator provides ample power for welding and can run on gasoline or propane, offering versatility and convenience.
The Honda EU7000iS is a top contender due to its inverter technology that ensures clean power, crucial for sensitive welding equipment. Its 7000 running watts and quiet operation make it suitable for both home and job site environments.
The Champion 100263 stands out with its ability to run on either gasoline or propane, providing great flexibility for users. With a starting wattage of 9500 watts, it can easily handle most welding machines and has a runtime of up to 11.5 hours on gasoline.
The Westinghouse WGen7500 is equipped with a powerful 420cc engine that delivers 7500 running watts, ensuring it can manage heavy loads like welders without breaking a sweat. It also features a user-friendly control panel and a remote start function for added convenience.
The Generac GP8000E is built tough, designed for both construction and recreational use, making it a reliable choice for welders. It has a heavy-duty alternator that provides a consistent power output, which is essential for maintaining stable welding arcs.
Lastly, the DuroMax XP12000EH offers 12,000 starting watts and allows users to switch between gasoline and propane, making it an excellent option for those who need portability and adaptability. Its robust construction and extensive power output make it capable of handling demanding welding tasks efficiently.
How Can You Safely Operate a Generator While Welding?
To safely operate a generator while welding, it is essential to consider several factors that ensure optimal performance and safety.
- Generator Size: Choose a generator with sufficient power output to support the welder’s requirements.
- Fuel Source: Select a generator that operates on a reliable fuel source to ensure continuous operation during welding.
- Grounding and Bonding: Properly ground and bond the generator to prevent electrical hazards during welding.
- Ventilation: Ensure adequate ventilation around the generator to prevent overheating and the buildup of harmful exhaust fumes.
- Load Management: Monitor the load on the generator to avoid overload, which can damage the generator and affect welding performance.
- Safety Gear: Always wear appropriate personal protective equipment (PPE) when operating the generator and welding.
Generator Size: It is crucial to select a generator that can handle the wattage required by the welder. Generally, a generator should have at least 20-30% more capacity than the welder’s rated output to accommodate the startup surge and ensure smooth operation.
Fuel Source: The most common fuel sources for generators are gasoline, diesel, or propane. Selecting a generator that uses a reliable and easily accessible fuel source minimizes downtime and ensures that you can continue welding without interruptions.
Grounding and Bonding: Proper grounding and bonding of the generator are vital to prevent electrical shock hazards. This involves connecting the generator’s frame to the ground using a grounding rod and ensuring that all welding equipment is also properly grounded.
Ventilation: Generators produce carbon monoxide and other harmful fumes, so they should be operated in well-ventilated areas. This is particularly important when welding, as the process can generate additional fumes, making ventilation essential for safety and comfort.
Load Management: Keeping track of the load on the generator is important to prevent overloading. An overloaded generator can lead to performance issues, power fluctuations, and potential damage to both the generator and the welder.
Safety Gear: Wearing appropriate PPE, such as gloves, helmets, and goggles, is critical when operating a generator and welding. This not only protects you from electrical hazards but also from sparks and other debris that may arise during the welding process.
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