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Firman H03651 Spec Review

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The Firman H03651 is an open frame dual fuel portable generator with a rated wattage of 3650 W and a starting wattage of 4550 W.

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Description

The H03651 Dual fuel generator can run on both Gas and Liquid Propane fuel, giving you flexibility during a storm, or when you’re out camping. This generator features 4550 starting watts and 3650 running watts (4100/3300 LPG) with an electric start, for ease of use. (source: Firman)

Zoom on the Firman H03651

In summary, the Firman H03651 is a portable generator especially useful for:

  • RV travellers wishing to enhance their freedom and nomad lifestyle
  • Homeowners who want to be able to use the most necessary devices in their household, even during a blackout
  • Professionals in need of safely powering high-intensity work or lighting equipment

The following sections will present you in detail its power characteristics, the different outlets it offers, its overall portability, the extra features it benefits from and any relevant emission compliance details.

Power & Run Time

The Firman H03651 in use

The Firman H03651

Thanks to its dual-fuel technology, the Firman H03651 delivers 120V and offers power and versatility. When gasoline-powered, it benefits from a running wattage of 3650W and a peak wattage of 4550W. When propane-powered, it has 3300 rated watts and 4100 peak watts.

With a noise rating of 75 dBA (just slightly more noisy than a vacuum cleaner), the generator features a conventional pull-start mechanism, but also a simple and elegant electric starter (battery included).

The H03651, with a fuel capacity of 5 gallons, reaches a run time of around 14 hours at 50% load utilizing gasoline (fuel consumption around 0.36 GPH). Alternatively, it can reach a run time of around 14 hours (on a 20 lbs tank - propane consumption around 0.34 GPH) with propane.

The H03651 is unsuitable for the powering of sensitive electronic devices due to its relatively high THD (<25%).

Several examples of what the generator may allow you to power simultaneously are:Note: Not all of these items may be able to start at the same time. These examples are based on a maximum load of 75 % and on wattage estimates. Use our wattage calculator to find out if this product will be suitable for your needs.

Outlets

The control panel features the upcoming 4 AC outlets:

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

This Firman generator is RV Ready, as it features a TT-30R receptacle (TT stands for 'Travel Trailer').

Portability

The dimensions of the Firman H03651, which are L24.7 x W21.8 x H21.6 in, and its typical, open frame design provides stability and enables the generator to be raised above ground level. The device has been designed for tough environments and demanding outdoor use.

Although this generator is technically considered 'portable' (in the sense that it can be moved), its 119.5 lbs make it incredibly difficult to manually lift and transport. Never less, thanks to a wheel kit (⌀8") and a folding handle (a decent solution to its lack of maneuverability), the generator can be easily moved, once placed the ground.

Features

Panel of the Firman H03651

The H03651's control panel

The H03651 and its control panel include a convenient meter, which displays voltage, frequency and lifetime hours. This feature comes handy when monitoring its status and activity.

The generator allows for a quick, easy and convenient assessment of its gas level, as it is equipped with a built-in fuel gauge.

Security-wise, this product benefits from an automatic low oil shut-off and an overload protection (circuit breaker), which gives you a complete peace of mind when using it.

Besides the classic documentation and a user manual to get you promptly started, the Firman H03651 also comes with some accessories: oil, tool kit, funnel and propane hose are included.

Emissions

The Firman H03651 is EPA-approved and CARB-compliant. Thus, selling and purchasing this generator is allowed in each of the 50 states, including California.

Moreover, it features a spark arrestor, so it is adequate for use in forested areas.

Product Video

The Firman H03651 versus other generators

The following charts are provided to give you an idea of how some of the key specs of the Firman H03651 compare to generators of similar power (between 3500 and 4500 W).

  • As its weight is 119.5 pounds, the Firman H03651 falls in the expected weight range of the devices in the 3500-4500 rated wattage category. If weight is your top priority, one of the champions in this power category is the Energizer eZV4500, weighing just 78 pounds.
  • If compared to generators capable of producing a similar running wattage, this generator with a lowest emitted noise of 75 dBA can be considered somewhat noisy. If you’d prefer a less noisy device, one of the most quiet devices, which share the same power range with this one, is the Westinghouse iGen4500, whose lowest noise levels reach just 52 dBA.
  • Since the H03651 boasts with a run time of 14 hours at 50% load, it can be safely judged as a device of a higher run time than most generators of a comparable output. If autonomy is your priority, one of the devices of a similar power output with the highest run time is the Honda EB4000, reaching 16 hours.
  • Even though run times are undoubtedly important, they are dependent on the fuel capacity to a large extent. For a more wholesome picture, we must take into consideration the fuel consumption of the generator As this generator uses an estimated 0.36 GPH (gallon per hour) at a 50% load, it finds itself in the average gasoline consumption range of similar products. If you are concerned with gasoline efficiency, having a fuel consumption of just 0.17 GPH, the Westinghouse iGen4200 is a device you should look out for.

Price comparison

As you can see from this dynamic chart, when compared to other 3500-4500W generators, the Firman H03651 is on the cheap side of the price range.

It can therefore be a really good buy if you're looking to acquire a budget generator.

The bottom line

STRENGTHS:
  • Inexpensive
  • Several accessories included
  • RV Ready
  • Electric start
  • Dual Fuel
  • High run time
AVERAGE SPECS:
  • Decent weight (119.5 lbs)
  • Decent fuel efficiency
WEAKNESSES:
  • No remote start
  • On the noisy side (75 dBA)

Do you own the Firman H03651 and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

Where to buy the Firman H03651?

You can easily buy your Firman generator online. You will benefit from a convenient delivery and avoid carrying the heavy package yourself. Here are a few reliable online sellers:
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Features and Specifications

General

InverterNo
PortableYes
Parallel capableNo
RV readyYes
FuelDual Fuel (gasoline/propane)
Engine208 cc Firman Max-Pro Series OHV 4-stroke
Starting systemRecoil, Electric

Power

VoltageAC: 120V 60 Hz
GasolinePropane
Running watts3650 W3300 W
Starting watts4550 W4100 W
Running amps30.4 amps27.5 amps
Peaks amps37.9 amps34.2 amps
Run time @50% load14 h14 h
Run time @25% loadN/AN/A

Features

GFCI outletsYes
Covered outletsYes
Automatic Voltage RegulationYes
AC outlets1x Duplex 120V 20A (5-20R) GFCI
1x 120V 30A (L5-30R)
1x 120V 30A (TT-30R)
DC outletsNo
Data centerVFT
IndicatorsNo
Fuel tankSteel, 5 gal
Fuel gaugeYes

Misc

Weight119.5 lbs
Dimensions (L x W x H)24.7 x 21.8 x 21.6 in
Noise (lower limit)75 dBA
THD< 25%
EmissionsCARB, EPA
SecurityLow oil and overload protection
Spark arrestorYes
NeutralBonded to frame
Accessories includedOil, funnel, tool kit and propane hose
Warranty3 years

Unlike many websites, we did our best to research each of the specs above. That being said, we are not immune to making the occasional mistake or omission. Should you notice any missing or incorrect values, don't hesitate to suggest improvements so we can address the issue.

About FIRMAN Power Equipment

Founded in 1999, Firman Power Equipment is a company with a short, but established history in the power equipment industry. Based in Arizona, the company offers an immense range of products, including power tools, automotive equipment, storage utilities, work wear, but most importantly, a wide selection of generators of all sizes, designs and outputs. Interestingly, Firman is a wholly owned subsidiary of the China National Machinery Industry Corporation - a somewhat well renowned company in China and acts as a de facto distributor of their products in the US.

Warranty Information

The Firman H03651 is covered under a warranty for up to 3 years. This warranty may be limited and may not cover all parts of the generator.
For more information about the warranty of Firman generators, please consult Firman's warranty policies. Alternatively, you can also contact their Customer Support: 1-844-FIRMAN1 (844-347-6261).

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