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Firman H03651 Generator Review

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One of the best dual fuel generators on the market

You'll have additional options in the event of a power outage or while camping thanks to the H03651 Dual Fuel Generator. An electric start and a starting power of 4550 watts (4100/3300 LPG) make this generator both powerful and convenient.

What I like about the Firman H03691 Generator

  • It is dual fuel, so has greater fueling options
  • It has a better run time than similar generator
  • It has an easy electric start
  • Good value for money
  • It is RV ready
  • Lots of accessories come with the starting bundle

Things that could be better

  • Even though the run time is high, the fuel efficiency is a little average
  • No remote start
  • Noise level is ok but not as quiet as an inverter generator
  • Weight is ok, but there are lighter generators with similar power
Firman Hybrid Series H03651 3650/4550 Watt Dual Fuel Generator, Yellow

Who are Firman Generators?

Firman Generators is a division of Sumec Machinery. China-based in Nanjing, Sumec Machinery has its North American headquarters in Atlanta. Sumec Corporation is a subsidiary of Sinomach.

Firman is a reliable source of power in more than 100 countries with over a decade of manufacturing experience. Each year, Firman provides 150 million watts of portable electricity to countries like Africa, Siberia, and Brazil, which face some of the harshest conditions on the planet. 

Power generators from Firman may be used for a wide range of applications, from emergency power to home backup to outdoor recreation and everything in between. As a result of these attributes, Firman has built up an excellent reputation in the industry.

Firman have a relationship with Kohler Engines, one of the oldest family-owned enterprises in the United States. Since its first generator was built in 1921, Kohler Engines has accumulated over 90 years of manufacturing experience. 

Firman Generators and engines of superior quality are currently produced for both the domestic and international markets by this specialized equipment company.

What features does the Firman H03561 have?

In addition to the H03651's control panel, it comes with a simple meter that indicates voltage, frequency, and the number of lifespan hours. This feature is important for monitoring its status and activity.

The generator's built-in fuel indicator makes checking the gas level quick, simple, and convenient.

An overload protection feature ensures that the generator will not overheat while it is in use.

The Firman H03651 also comes with a propane hose, a tool kit, oil, and a funnel, in addition to the standard documentation and an owner's manual that allow you to get started immediately.

There are four AC outlets on the control panel:

  • 120V 20A Duplex (5-20R) GFCI
  • 120V 30A receptacle (L5-30R) 
  • 120V 30A (TT-30R)

Thanks to its Travel Trailer T-30R receptacle, this Firman generator is RV ready.

The Firman H03651 is approved by the EPA and CARB. Thus, the product can be sold and bought across the entire United States.

It also features a spark arrestor, which makes it perfect for use in woodland areas.

How powerful is the Firman H03651?

The Firman H03651 provides 120V power and versatility thanks to its dual-fuel technology. A running power of 3650W and a peak power of 4550W can be achieved when fuelled by gasoline. In propane mode, it has a rated power of 3300 and a peak power of 4100 watts.

It has a noise level of 67 dBA (less than background music), and can be started using either a conventional pull-start mechanism or an electric starter that is both simple and easy to operate.

The H03651 has a 5-gallon fuel tank and can run for around 14 hours at 50% load on gasoline. If you have a 20-pound tank of propane, it can run for about 11 hours on a 20-gallon tank.

Because of its significant transient harmonic distortion, the H03651 should not be used to power delicate electronic equipment.

Firman Hybrid Series H03651 3650/4550 Watt Dual Fuel Generator, Yellow

How Portable is the Firman H03651?

By utilizing the Firman H03651's standard open frame design, which measures 24.7 x 21.8 x 21.6 inches, the generator is both stable and portable. For those who spend a lot of time outside, this style is ideal.

Despite the generator's official designation as 'portable,' its weight of 119.5 lbs makes it hard to carry. Which is why there is a 8" wheel kit and foldable handle that make it easy to move once it's on the ground.

How to store the Firman H03651

Short term storage

It may be tough to get the unit going if it hasn't been used a lot. To avoid a rocky start, take the following precautions:

OrderAction
Step 1The generator should be run for at least 30 minutes once a month.
Step 2The gasoline shut-off valve should be closed and the generator kept running until the engine shuts down.
Step 3Select "OFF" on the selector lever.

Long term storage

The carburetor, fuel lines, and tank are all vital parts of the gasoline system that must be protected from gum deposits while the vehicle is in storage.

It has also been demonstrated that alcohol-blended fuels (also known as gasohol, ethanol, or methanol) attract moisture, resulting in separation and acid production during storage.

When the generator is not in use or is being stored for more than a month, take these precautions:

OrderAction
Step 1If it hasn't been done already, put a commercially available FUEL STABILIZER in the tank that is properly built.
Step 2The engine should be running for 5 to 10 minutes before shutting it down, to circulate the fuel through the fuel lines and the carburetor.
Step 3After the engine has cooled down, remove all of the gasoline from the fuel tank. Use a commercially supplied non-conductive vacuum siphon.
Step 4Set the fuel selector switch to "GAS" if there is a shortage of gas. Fire up the generator and let it run till the fuel runs out. Carburetors, fuel lines, and tanks will be drained of any remaining gasoline.
Step 5It's time to turn off the fuel selector switch.
Step 6Close the LPG cylinder knob and remove the LPG cylinder from the generator if it is open.
Step 7After it has totally cooled, clean and store the device.
Step 8Replace the oil with a quality that meets your needs.
Step 9To scatter the oil for cylinder lubrication, remove the spark plug and pour about a teaspoon of engine oil into the hole. Replace the spark plug and restart the engine. Once again, connect the spark plug.
Step 10Until you meet resistance, keep retreating. By doing so, the valves will be closed and moisture will be kept out of the engine.
Step 11Clean, dry, and out of direct sunlight are the best conditions for storing the device.

Why owning a generator is a good idea

If you're doing something thrilling like camping or tailgating, Firman will always be there to help you out. Firman generators come with a three-year warranty since they are so well-made.

Bad weather is responsible for the majority of power outages. As the frequency and intensity of extreme weather events rises, so does the likelihood of a power outage lasting more than 24 hours. You'll never be afraid of the dark again if you use Firman generators.

In the event that your refrigerator has been without electricity for more than four hours, the FDA recommends throwing out perishable food products.

The Firman portable backup generator can save you money on replacing products that work out are more expensive than the generator, such as your refrigerator/freezer. Firman generators have been used to preserve food for about two decades.

Human speech has an average decibel level of between 55 and 65 dB during a normal dialogue. Having to talk louder near a Firman is unnecessary because some Firman Generators  make less noise than average speaking decibels.

60 percent of all homes, old and new, suffer from basement water problems caused by storm surges and power outages. Portable generators from Firman can keep your basement or crawlspace dry and safe for your things in the event of a power outage. 

Because of its high purity, propane isn't considered a greenhouse gas by the United Nations Framework Convention on Climate Change. Fueled by either gasoline or liquid propane, Firman's portable generators are dual-fuel. 

47 percent of the construction industry's earnings comes from rents. Allowing clients to choose between purchasing and renting gives nervous customers a chance to test the product before deciding whether or not to buy. If you rent a Firman generator first, I think you will end up buying one. 

As of 2019, 98 percent of organizations estimate that a single hour of downtime costs more than $100,000, therefore every minute counts.

Going without electricity for even an hour might be a tremendous inconvenience for you, your clients, and customers. Portable generators by Firman are among the most reliable on the market.

Is the Firman H03651 powerful enough for you?

How to calculate what size generator you need:

Small camping generators can provide anywhere from 1,000 to 3,000W of power, while heavy-duty generators can provide more than 10,000W.

It's important to know how much energy you use to determine the size of a generator that's right for your home.

Decide which devices you wish to run on the system. The AC, refrigerator, and lighting circuits in your home must all be included if you require a backup generator in the event of a power loss.

Calculate the amount of electricity you'll need. The following is worth noting: starting watts are higher than running watts. 

Use the generator that is somewhat larger than you think you need. This gives you room for error. Running a generator at close to full load all the time will affect its life expectancy. Generators are also relatively noisier at full loads. 

So, for example, if you need 1600 watts of continuous power, purchase a generator with at least 1800 watts of rated power, and for 6800 watts of continuous power and 8200 watts of starting power, get a generator with 7500 rated and 9500 watts of rated power.

Is the Firman H03651 powerful enough to run a house?

If you need to run your refrigerator, freezer, well pump and lighting circuits on a generator rated at 5,000 to 7,500 watts, you may do so with ease. A 7500-watt generator can power all of these devices at the same time. An RV can get by with a 3000-4000 watt generator.

Your home appliances' wattage must be taken into account to decide what size generator is needed for a residence. The watts or amps of a device are usually listed on the packaging.

Before acquiring a generator, you need to ask yourself one question: Do I need the generator to power only the vital equipment or the entire house? If so, I think you will need a larger generator. The Firman H03691 is good enough to run vital household equipment for sort periods of time in an emergency. 

The larger the generator, the better if you reside in a disaster-prone area with regular power outages. The higher cost may be worth the peace of mind it brings.

For those who only plan to use the generator a few times a year, a smaller generator that can run the necessary equipment is the best option.

Firman Hybrid Series H03651 3650/4550 Watt Dual Fuel Generator, Yellow

How does the Firman H03651 compare to other generators?

Firman H03651 is in the normal weight range for 3500 to 4500 rated watt generators, having a dry weight of 119.5 lb. The WEN GN400i, which weighs just 66.1 pounds, is a powerhouse in its category.

The generator's 67 dBA noise level is considered average for its power category. A quieter option is the Cummins Onan P4500i, which falls within the same power range as this one. The lowest possible noise level is 52 decibels (dBA) for that generator.

The H03651 can run for 14 hours at 50% load, which is longer than many other generators with similar output. In terms of autonomy, the Predator 4375, with a run time of around 16 hours, is one of the devices with the most power and the longest run time.

While the running duration is significant, it is dependent on the fuel tank volume and so does not say much on its own unless we additionally include fuel consumption. This generator consumes 0.36 GPH at 50% load, which is in the middle of the pack when compared to other generators of the same output.

You may want to consider the Westinghouse iGen4200 if you don't like the above-mentioned fuel usage. At only 0.17 GPH, it is among the most fuel-efficient generators on the market.

Final Thoughts

In conclusion, the Firman H03651 is a very good generator that provides excellent value for money and would be ideal for:

  • Travelers in RVs who want even more independence, and want to live off grid for longer periods of time without visiting electric hook up campsites.
  • Participants in various outdoor adventures, concerts, tailgating, and car camping.
  • People whose lives depend on having access to a reliable power source in case of an unexpected outage.
  • To ensure that a power loss doesn't disrupt their workday, for remote workers and construction jobs.

About Tom Bell

Hey, I’m Tom, the owner of Generator Reviews! I built this website to help you get the very most out of your generator and select the correct one for your personal circumstances. This site contains reviews of virtually every generator, detailed buying guides, as well as maintenance advice to help you keep yours in tip-top shape!

Disclaimer

Generator.Reviews is an independent review business. I am not affiliated with any manufacturers and do not accept paid reviews. When you buy through my links, I may earn a commission which helps me to maintain this website and keep the reviews coming your way!

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