Memorial Day
-No User ReviewsWrite a review
ShortlistShortlistedRemoved from shortlist 11
Amazon 
eBay 
Northern Tool Page Content
Description
Zoom on the Firman H03651
In summary, the Firman H03651 is a portable generator especially useful for:
- RV travellers looking for even more independence
- Occasional participants of outdoor events, competitions, concerts and festivals
- Homeowners in need of an emergency backup power for their essentials
- Professionals who want to ensure that a power failure will not prevent them from working
In the sections ahead, the power characteristics, availability of various outlets, the portability, and any additional features of the device shall be discussed, including its emission compliance information.
Power & Run Time
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.
At a noise rating of 67 dBA (less noisy than background music), this generator can be started via a conventional pull-start mechanism, or a convenient and easy-to-use 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 11 hours (on a 20 lbs tank - propane consumption around 0.43 GPH) with propane.
Since the H03651 has a somewhat high THD (<25%), it is advisable to not use it for the powering of sensitive electronic devices.
Outlets
The control panel includes the following 4 AC outlets:
This Firman generator is RV Ready, thanks to its TT-30R receptacle (TT stands for 'Travel Trailer').
Portability
With its dimensions of L24.7 x W21.8 x H21.6 in, the conventional, open frame design of the Firman H03651 offers stability and allows the generator to be raised above ground level. This type of design is ideal for tough environments and heavy outdoor use.
Since the generator weighs 119.5 lbs, it will be incredibly difficult to manually lift it and transport it, even though it is technically considered to 'be portable' (in the sense that it is movable). Nevertheless, it can still be moved quite conveniently with the help of its wheel kit (⌀8") and its folding handle, once it is placed on the ground.
Features
The H03651's control panel
The H03651 and its control panel include a convenient meter showing you 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.
From a security point of view, the generator is equipped with an automatic low oil shut-off and an overload protection (circuit breaker), giving you a peace of mind during use.
Apart from the typical documentation and an owner's manual (opens in a new tab), which lets you start it right away, the Firman H03651 also is packed along with the following accessories: propane hose, tool kit, oil and funnel.
Emissions
The Firman H03651 is EPA-approved and CARB-compliant. It can therefore be sold and purchased in all 50 states, including California.
Moreover, it features a spark arrestor, which makes it suitable 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).
- Having a dry weight of 119.5 lbs, the Firman H03651 belongs in the expected weight range for generators which produce 3500 to 4500 rated watts. If weight matters to you, one of the champions in this power range is the WEN GN400i with only 66.1 pounds.
- The generator can be considered average in its noise for its power category, as it is rated at 67 dBA. 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 Cummins Onan P4500i, whose lowest noise levels reach just 52 dBA.
- Thanks to an impressive running time of around 14 hours at 50% load, the H03651 benefits from a higher run time than many generators of a similar output. If autonomy is your priority, one of the devices of a similar power output with the highest run time is the Predator 4375, reaching around 16 hours.
- While the run time is an important parameter, it is dependent on the fuel tank’s capacity and thus, doesn’t say much on its own unless we consider fuel consumption as well. This generator has an estimated fuel consumption of roughly 0.36 GPH (gallon per hour) at a 50% load, rendering it somewhat average compared to devices of a similar output. If not satisfied with the afore-mentioned fuel consumption, you may wish to check out the Westinghouse iGen4200. With a fuel consumption of as little as 0.17 GPH, it is one of the most efficient generators currently on the market.
Price comparison
As you can see from this interactive chart, when compared to other 3500-4500W generators, the Firman H03651 is on the average side of the price range.
Therefore, this generator nicely fits in the expected budget for this kind of product.
The bottom line
- In the expected price range
- Several accessories included
- GFCI Outlets
- RV Ready
- Electric start
- Dual Fuel
- High run time
- Decent weight (119.5 lbs)
- Acceptable noise (67 dBA)
- Decent fuel efficiency
- No remote start
Features and Specifications
| Inverter | No |
|---|---|
| Portable | Yes |
| Parallel capable | No |
| RV ready | Yes |
| Fuel | Dual Fuel (gasoline/propane) |
| Engine | 208 cc Firman Max-Pro Series OHV 4-stroke |
| Starting system | Recoil, Electric |
| Voltage | AC: 120V 60 Hz |
| Gasoline | Propane | |
|---|---|---|
| Running watts | 3650 W | 3300 W |
| Starting watts | 4550 W | 4100 W |
| Running amps | 30.4 amps | 27.5 amps |
| Peak amps | 37.9 amps | 34.2 amps |
| Run time @50% load | 14 h | 11 h |
| Run time @25% load | Unknown | Unknown |
| GFCI outlets | Yes |
|---|---|
| Covered outlets | Yes |
| Automatic Voltage Regulation | Yes |
| AC outlets |
|
| DC outlets | No |
| Data center | VFT |
| Indicators | No |
| Fuel tank | Steel, 5 gal |
| Fuel gauge | Yes |
| Weight | 119.5 lbs |
|---|---|
| Approx. dimensions (L x W x H) | 24.7 x 21.8 x 21.6 in |
| Noise (lower limit) | 67 dBA |
| THD | < 25% |
| Compliance | CARB, EPA |
| Security | Low oil and overload protection |
| Spark arrestor | Yes |
| Neutral | Bonded to frame |
| Accessories included | Oil, funnel, tool kit, propane hose, battery, and wheel kit |
| Warranty | 3 years |
| Series | Hybrid |
| UPC | 840876136515 |
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 (opens in a new tab). Alternatively, you can also contact their Customer Support: 1-844-FIRMAN1 (844-347-6261).
Questions & Answers
What can it power?
| Item | Running Watts | Starting Watts | |
|---|---|---|---|
| At home | Dish washer | 1500 | 3000 |
| Refrigerator (energy star) | 192 | 1192 | |
| Vacuum cleaner | 1075 | 1175 | |
| Radio | 100 | 100 | |
| Pair of small speakers | 45 | 45 | |
| Total | 2912 W | 4412 W | |
| For camping | RV AC (11,000 BTU) | 1010 | 1600 |
| RV refrigerator | 180 | 600 | |
| Electric grill | 1650 | 1650 | |
| Set of 5 LED light bulbs | 55 | 55 | |
| Total | 2895 W | 3485 W | |
| For work | Table saw | 1800 | 4500 |
| Total | 1800 W | 4500 W |
How much oil does it take? (Asked December 14, 2019)
The oil capacity is 20.3 oz.
When connecting this generator to propane with the supplied hose,.....do I just connect the propane tank with the hose to the generator? Is the propane regulator built into the generator? Or do I need to buy a separate regulator? Thank you. (Asked December 10, 2020)
The regulator is included with the LPG hose.
Couldn't find the right answer for you? Ask your own question.
