Firman P03613 - 3650/4550W Portable Generator
The Firman P03613 is a portable open frame generator with a rated wattage of 3,650 W and a starting wattage of 4,550 W. (Read full specs)
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Zoro | Price history for the Firman P03613 |
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| Highest Price $1,025.99 Lowest Price $494.99 Current Price $549.99 |
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Description
Zoom on the Firman P03613
In a few words, the Firman P03613 is a portable generator perfectly suited for:
- RV travellers wishing to enhance their freedom and nomad lifestyle
- People occasionally participating in outdoor fairs, festivals or events
- Homeowners who want to be sure of their ability to power their fridges, cooking tools, heating and lighting equipment during power failures
In the upcoming sections, you'll discover its power characteristics, the array of outlets it presents, its overall portability, and the additional features it possesses.
Power & Run Time
The Firman P03613
The Firman P03613's engine, 208 cc Firman Max-Pro Series OHV 4-stroke with cast iron sleeve, fueled by gasoline, can deliver 120V. It provides a running wattage of 3,650W and reaches a peak wattage of 4,550W.
The generator features a traditional recoil pull-start mechanism. It is rated for a noise of 67 dBA (less noisy than a normal conversation).
The fuel capacity of 5 gallons allows the P03613 to operate for around 14 hours at 50% load with a full tank (fuel consumption around 0.36 GPH).
The quite high THD (<25%) of the P03613 makes it unsuitable for powering sensitive electronic devices.
Outlets
The control panel features the following 4 AC outlets:
Featuring a TT-30R receptacle (TT for 'Travel Trailer'), this Firman generator is RV Ready, designed specifically for use with recreational vehicles.
Portability
With a size of L24.8 x W21.7 x H21.7 in, the Firman P03613 features an open frame design, providing stability and simplified maintenance access to components, enhancing air circulation. The device has been designed for tough environments and demanding outdoor use.
As the P03613's weight is only 108.5 lbs, it can follow you and your power needs anywhere. Additionally, its wheel kit (⌀8") and its folding handle will allow for simple relovation of the generator once it's on the ground.
Features
The P03613's control panel
The P03613's status and activity may be monitored conveniently via the control panel, as it features a convenient meter showing you voltage, frequency and lifetime hours.
In addition to this info, a light indicator shows you if the oil level is too low.
A built-in fuel gauge allows for a quick, easy and convenient check of the fuel level of the generator.
As far as security is concerned, the generator comes with an automatic low oil shut-off and an overload protection (circuit breaker), providing peace of mind during use.
The P03613 also benefits from Firman’s CO Alert carbon monoxide shutdown, which automatically shuts down the engine when harmful levels of carbon monoxide accumulate around the generator or a CO Alert fault occurs.
Along the basic documentation and an owner's manual (opens in a new tab), useful for starting the generator right away, the Firman P03613's package also includes these accessories: funnel, tool kit and oil.
Product Video
The Firman P03613 versus other generators
The following charts are provided to give you an idea of how some of the key specs of the Firman P03613 compare to generators of similar power (between 3500 and 4500 W).
- At 108.5 lbs in dry weight, the Firman P03613 fits well within the typical weight bracket for generators producing 3500 to 4500 rated watts. if you wish to prioritize weight, the WEN 56432iX is one of the top contenders in its power category, weighing only 52.9 pounds.
- At 67 dBA, this generator's noise rating is in line with the expected average for devices within its power category. If noise emissions are one of your priorities, you may want to take a look at the Westinghouse iGen5000DF. It's one of the quietest options among generators of similar power, rated at 52 dBA.
- At 50% load, the P03613 achieves one of the longer run times compared to devices of similar power, sustaining operations for around 14 hours. If concerned with autonomy, one of the products of a comparable power output, which offers the highest run time, is the NorthStar c5500, boasting with around 15.1 hours.
- Autonomy holds its importance, however, it is largely dependent on the generator’s fuel capacity and so, it is nonsensible to discuss it without mentioning fuel efficiency as well. This generator has an average fuel consumption among comparably powerful devices, as it reaches 0.36 GPH (gallon per hour) at a 50% load. If you wish to further improve in the area of fuel efficiency, the Westinghouse iGen5000DF, which boasts with a gas consumption of only 0.23 GPH, may be the right generator for you.
Price comparison
As you can see from these interactive charts, when compared to other 3500-4500W generators, the Firman P03613 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
- Inexpensive
- CO Alert technology
- RV Ready
- High run time
- Decent weight (108.5 lbs)
- Acceptable noise (67 dBA)
- Decent fuel efficiency
- No electric start
Do you own the Firman P03613 and agree (or disagree) with these strengths and weaknesses?
Let us know and write your own review.
Features and Specifications
| Inverter | No |
|---|---|
| Parallel capable | No |
| RV ready | Yes |
| Fuel | Gasoline |
| Engine | 208 cc Firman Max-Pro Series OHV 4-stroke, cast iron sleeve |
| Starting system | Recoil |
| Warranty | 3 years |
| Voltage | AC: 120V 60 Hz |
|---|---|
| Running watts | 3,650 W |
| Starting watts | 4,550 W |
| Running amps | 30.4 amps |
| Peak amps | 37.9 amps |
| Run time @50% load | 14 h |
| Run time @25% load | Unknown |
| GFCI outlets | No |
|---|---|
| Covered outlets | Yes |
| Automatic Voltage Regulation | Yes |
| AC outlets |
|
| DC outlets | No |
| Data center | VFT |
| Indicators | Low oil |
| Fuel tank | Steel, 5 gal |
| Fuel gauge | Yes |
| Weight | 108.5 lbs |
|---|---|
| Approx. dimensions (L x W x H) | 24.8 x 21.7 x 21.7 in |
| Noise (lower limit) | 67 dBA |
| THD | < 25% |
| Compliance | CARB, EPA, ANSI/PGMA G300-2023 |
| Security | Low oil and overload protection, CO monitoring |
| Spark arrestor | Yes |
| Neutral | Floating |
| Accessories included | Oil, funnel, tool kit, and wheel kit |
| Country of origin | China |
| Series | Performance |
| UPC | 840876136133 |
We've taken extra care to research and verify each of the specifications above. That said, occasional mistakes or omissions are still possible. If you spot any missing or inaccurate information, feel free to suggest a correction so we can address it.
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 P03613 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 | Refrigerator (energy star) | 192 | 1192 |
| Hair dryer | 1800 | 1900 | |
| Washing machine | 900 | 1650 | |
| Total | 2892 W | 3892 W | |
| For camping | Radiant heater | 1300 | 1300 |
| RV refrigerator | 180 | 600 | |
| RV AC (11,000 BTU) | 1010 | 1600 | |
| Blender | 400 | 850 | |
| Total | 2890 W | 3480 W | |
| For work | Table saw | 1800 | 4500 |
| Total | 1800 W | 4500 W |
What should the spark plug gap be set to (Asked May 01, 2021)
Electrode gap should be 0.028” to 0.031”.
Can this generator plug a washing machine ? (Asked May 16, 2021)
There should be no problem powering a standard residential washing machine with this unit.
I recently had a backup Power Transfer Meter installed at my home. It states in the manual: "must have access to a 30A, 120V/240V with a standard National Electrical Manufacturers Association (NEMA) L14-30P plug portable generator with overcurrent protection." Not sure if my Firman 3650 meets these standards, as the plug that attaches to the meter is a 4-prong and the generator only has a 3-prong outlet for an RV? do i need a new geneator or just an adapter for the power cord to attach to the outlet on this generator? (Asked September 26, 2025)
The generator does not provide 240V.
Couldn't find the right answer for you? Ask your own question.
