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Firman 10,000-Watt Portable Generator - 8,000 Running Watts - Propane or Gas - Electric Start

Firman 10,000-Watt Portable Generator - 8,000 Running Watts - Propane or Gas - Electric Start

Item # 333-H08051
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Firman Generators - 333-H08051
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Product Images

Is this right for you? Product Expert Alex H says:

Yes, if you:

  • Don't mind sacrificing a little power to be able to use propane
  • Need a lot of power - this is perfect as a home backup during a power outage
  • Need a 50-amp outlet for your RV or an inlet box at home

No, if you:

  • Are worried about drowning out conversation at the campground
  • Need to charge or power sensitive electronics like a laptop or HDTV
Dual fuel generator uses propane or gas to supply power for heavy-duty equipment or emergency situations. Keeps high-draw appliances running during a power outage. Simple, push button electric start. Includes easy-to-use propane hose with regulator. Call 800-298-8924 to order Firman generators part number 333-H08051 or order online at etrailer.com. Free expert support on all Firman products. Guaranteed Lowest Price and Fastest Shipping for Firman 10,000-Watt Portable Generator - 8,000 Running Watts - Propane or Gas - Electric Start. Generators reviews from real customers.
  • All Info
  • Reviews (1)
  • Q & A (17)
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  • Why etrailer?

Firman Generators - 333-H08051

  • Firman
  • Gas
  • Propane
  • 10000 Starting Watts
  • 8000 Running Watts
  • No Inverter
  • Electric Start
  • 120 Volt Output
  • 240 Volt Output
  • Wheels
  • Outdoor Use Only

Dual fuel generator uses propane or gas to supply power for heavy-duty equipment or emergency situations. Keeps high-draw appliances running during a power outage. Simple, push button electric start. Includes easy-to-use propane hose with regulator.


Features:

  • 10,000-Watt, dual fuel generator provides a portable power source
    • Use propane or gas during trips in your RV or in an emergency
  • Electric-start engine offers easy, push button startup
    • Recoil handle lets you pull start the engine if needed
  • 3-in-1 Data-Minder monitors voltage, frequency, and running hours
  • Firman 4-stroke engine uses standard unleaded gas or propane - no need to mix gas and oil
  • Whisper series muffler ensures efficient operation
  • Warning lights, voltage regulator, and spark arrestor promote accident-free use
  • Fold-down handle and 10" flat-free wheels provide easy mobility
  • Strong, tubular steel frame
  • Clean-running engine meets CARB and EPA standards


Specs:

  • Outlets:
    • (2) 120V 20-amp GFCI
    • (1) 120V 30-amp L5-30R
    • (1) 120V/240V 30-amp L14-30R
    • (1) 120V/240V 50-amp 14-50R
  • Starting (surge) power output:
    • Gas: 10,000 watts
    • Propane: 9,050 watts
  • Running (rated) power output:
    • Gas: 8,000 watts
    • Propane: 7,250 watts
  • Continuous run time at 1/2 load: 12 hours
  • Noise level (normal conversation is 60 dB):
    • Measured at 25' away at 1/4 load in standard mode: 74 dB
  • Engine type: Firman Max-Pro Series 439-cc, single cylinder, air-cooled, 4-stroke OHV
    • Horsepower: 15
  • Fuel type: gasoline or propane
    • Gas tank capacity: 8 gal
  • Oil type: SAE 10W-30
    • Capacity: 1.16 qt
  • Power line frequency: 60 Hz
  • Dry weight: 212 lbs
  • Dimensions: 29-13/16" long x 27-1/2" wide x 26-1/8" tall
  • Warranty:
    • 3-Year limited warranty for residential use
    • 180-Day limited warranty for commercial use

Includes:

  • Battery
  • 5-1/2' Propane hose with regulator
  • Folding handle
  • Support leg with vibration mounts
  • 10" flat-free wheels
  • Engine oil
  • Oil funnel
  • Spark plug wrench
  • 2 double open wrenches (10 mm and 12 mm)


Notes:

  • Gas generators produce carbon monoxide, which is poisonous. For your safety, always be sure to operate this gas-powered generator outdoors.
  • Because this generator does not have a built-in inverter to control the electrical current, the voltage can fluctuate. Therefore, do not plug sensitive electronic devices such as a computer or television into the generator.

Certifications

Meets the following important certification standards:

  • US Environmental Protection Agency (EPA)
  • California Air Resources Board (CARB)

High-Output Capacity

H05751 outlets

The Firman H08051 Dual Fuel generator produces 10,000 watts of power to get you up and running whether you're at the campsite, at the worksite, or faced with an emergency. This powerful generator comes with (2) 120V GFCI protected outlets for safely powering household appliances, tools, and electronic devices. It features (1) 120V L5-30R twist-lock outlet for large appliances and motorized tools with greater electrical demands. It includes (1) 120V/240V L14-30R twist-lock outlet that provides a connection point for an inlet box used in home backup power. Lastly, it has (1) 120V/240V 50-amp 14-50R RV outlet, ensuring you'll have access to electricity no matter where you take your RV or if there's a power outage at the campground. The generator also has outlet covers to help keep out moisture and debris.


Easy Electric Start Engine

The generator's engine starts up easily at the push of a button. Simply turn the fuel valve to "on" and flip the engine switch to the "run" position. Then, push the battery power restore switch for a few seconds and release. Once you press the start button, the generator will turn on.


Before starting your generator, ensure nothing is connected to the outlets. Start your generator and let the engine run for a few minutes to warm up and stabilize. Once the generator is up and running, follow the recommended order of operation: connect the device with the highest starting watts first, like your air conditioner or refrigerator, then work your way down to the device with the lowest starting watts. By connecting devices in this order, you'll ensure the generator has enough power to start high-wattage loads.


Dual Fuel Capability

H05751 switch

For flexibility and convenience during road trips or in an emergency, this generator can use gasoline or propane to power the engine. In addition, using propane as an alternative fuel is a cleaner option for the environment. However, the power output slightly decreases while using propane.


  • Starting (surge) power output:
    • Gas: 10,000 watts
    • Propane: 9,050 watts
  • Running (rated) power output:
    • Gas: 8,000 watts
    • Propane: 7,250 watts

H05751 propane tank

It also includes a 5-1/2' LPG hose to connect your propane tank. Once you have connected your generator, turn the fuel selector switch to the LPG position and start it up.


Safety Features

This generator comes with a number of safety features to protect you, the environment, and the generator itself. When the generator is low on oil, a light-up indicator flashes and the engine will automatically shut down to prevent damage. If an overload is detected, either by exceeding the generator's limits or a power surge, the circuit breaker will stop supplying power to the connected devices. The digital voltage regulator assists in minimizing voltage fluctuations which helps to maintain a steady flow of electricity. Also, a built-in spark arrestor helps prevent any sparking that might burn someone or start a fire. This arrestor has been certified by the USDA Forest Service.


Choosing a Generator

When choosing a generator, you need to match the generator's starting and running output with the electrical demands of the equipment you want to operate.


Power Demands

Starting (surge) wattage is the power a device requires at startup. Running (rated) wattage is the power needed to keep the device running. A large appliance with an electric motor such as a furnace, refrigerator, air conditioner, or washing machine may require 2 to 3 times more starting wattage than running wattage.


It is always best to start your generator with no load connected, then add each device one at a time. Additionally, a good practice to consider is connecting your devices in order from highest starting watts to lowest starting watts. As you connect and start devices, your available wattage decreases. This order of operation allows you to start devices with the highest power demands when there is more power available.


Will This Generator Run My RV Air Conditioner?

At etrailer, we perform numerous tests on generators that put them through real-world experience. An extensive part of this testing includes starting and running RV air conditioners. The following table will help you decide if the e3200 inverter generator has enough power to handle this critical function in your RV.


Air ConditionerWill it start and run?
Single 13,500 BtuYes
Single 15,000 BtuYes
Dual 15,000 BtuYes

Running Watts and Starting Watts of Common Appliances


ApplianceRunning WattsStarting Watts
Air compressor (1/2 hp)1,0002,000
Air conditioner (15,000 Btu)1,600*
Air conditioner (13,500 Btu)1,300*
Air conditioner (10,000 Btu)1,000*
Blender400850
Cell phone charger110
Clock radio40
Coffee maker (high setting)1,0660
Crock pot (low setting)1260
Crock pot (high setting)3740
Desktop computer150 - 3500
DVD player140
Electric drill (3/8" / 4 amps)450600
Electric space heater (high setting)1,4500
Floor fan1000
Hair dryer (low setting)1600
Hair dryer (high setting)1,3000
LCD television (32")680
Microwave1,0000
Refrigerator8001,600
Washing machine1,1502,250
Work light (quartz halogen)1,0000

* The starting wattage on air conditioners can vary greatly depending on several factors, including the assistance of built-in capacitors and cold starts. Because of this, we can't list a standard starting wattage as every application can be different.


Determining Your Power Needs

The following section provides calculations for wattage estimates. This will give you an overall picture of your potential power usage and help you decide on the generator that is right for you.


Industry Standard Calculation

The Industry Standard Calculation is a quick and easy way to determine your required wattage. It may provide some padding in your wattage requirements, which could give you more power than you actually need, but you shouldn't have to worry about not having enough power. The following steps will help you quickly calculate the correct size generator to meet your application.


As stated earlier, you should always start your generator without any load, and then connect each device one at a time. The following calculation requires this approach to work. However, using this calculation removes the worry of connecting devices in a certain order.


1. Determine the starting watts and running watts for the devices that you want to plug into the generator.

a. Find the starting (surge) watts and running (rated) watts for each device that you want to plug into the generator. Look for a sticker or plate on each device or check your owner's manuals.

b. If your device or manual only shows amps and volts, watts can also be determined through a simple formula. (Amps x Volts = Watts)

c. List all of your starting watts and running watts as seen in Table 1 below.


Table 1

Example DevicesStarting WattsRunning Watts
Air compressor2,0001,000
Refrigerator1,600800
Microwave01,000
Blender850400

2. To find the total starting watts required, add the starting watts for the device with the highest value to the running watts of all the other devices from Table 1.


2,000 + 800 + 1,000 + 400 = 4,200 total starting watts


3. To find the total running watts, add all of the running watts together from Table 1.


1,000 + 800 + 1,000 + 400 = 3,200 total running watts


To run all of these devices simultaneously, you would require a generator with at least 4,200 starting watts and 3,200 running watts.


Advanced, Precise Calculation

While the method for calculating your power needs outlined above will work, it isn't the most precise. If you aren't afraid of doing a little more math, you can use the Advanced, Precise Calculation to get a more accurate idea of how much power you will need and potentially save yourself some money. Because the calculation above pads in enough power to ensure you can start your devices in any order, it may point you to a bigger and more expensive generator than you need. However, by following the more regimented, order-of-operations calculation below, you'll get a much more precise idea of how much power you need, which could in turn point you to a smaller and less expensive generator.


Again, you should always start your generator without any load, and then connect each device one at a time. The following calculation also requires that you start your devices in order from highest starting watts to lowest starting watts. When you connect devices in this order, you can start high demand devices when there is more power available.


1. Determine the starting watts and running watts for each device that you want to plug into the generator.

a. Find the starting (surge) watts and running (rated) watts for each device that you want to plug into the generator. Look for a sticker or plate on each device or check your owner's manuals.

b. If your device or manual only shows amps and volts, watts can also be determined through a simple formula. (Amps x Volts = Watts)

c. List out these devices from highest starting watts to lowest starting watts as seen in Table 2 below.


Table 2

Example DevicesStarting WattsRunning Watts
Air compressor2,0001,000
Refrigerator1,600800
Microwave01,000
Blender850400

2. To find the total running watts, add all of the running watts together from Table 2.


1,000 + 800 + 1,000 + 400 = 3,200 total running watts


3. In Table 3, shown below, the values from Table 2 are used to calculate the highest total starting watts required as devices are connected and running. This number represents the highest power requirement you will encounter as you connect all of your devices to the generator. To find this, add the starting watts of each new device you connect to the combined running watts of all connected devices. The highest of these numbers will be the total starting watts required. And again, remember to always connect devices in order from highest starting watts to lowest starting watts.


Table 3

DeviceStarting WattsRunning Watts of All Connected DevicesTotal Starting Watts Required
1. Air compressor2,000 +0 (nothing connected)= 2,000
2. Refrigerator1,600 +1,000 (air compressor)= 2,600
3. Microwave1,000* +1,800 (air compressor + refrigerator)= 2,800
4. Blender850 +2,800 (air compressor + refrigerator + microwave)= 3,650

* Even though the microwave does not have starting watts listed, you have to account for the power needed to actually run it.


850 + 2,800 = 3,650 highest total starting watts required


In order to run all of these devices simultaneously, you would require a generator with at least 3,650 starting watts and 3,200 running watts.



H08051 Firman 10000 Watt Dual Fuel Hybrid Portable Generator - Gas or Propane - Electric Start

Installation Details 333-H08051 Installation instructionsAlternate Instructions 333-H08051 Installation instructions


California residents: click here



Customer Reviews

Firman 10,000-Watt Portable Generator - 8,000 Running Watts - Propane or Gas - Electric Start - 333-H08051

Average Customer Rating:  5.0 out of 5 stars   (1 Customer Reviews)

Dual fuel generator uses propane or gas to supply power for heavy-duty equipment or emergency situations. Keeps high-draw appliances running during a power outage. Simple, push button electric start. Includes easy-to-use propane hose with regulator.

- 333-H08051
by: 09/17/2020

Have not needed to use generator yet. 882249


1
1

Ask the Experts about this Firman Generators

  • Generator for Powering Single 30 amp AC Unit on Travel Trailer
    The Firman Generator part # 333-H08051 that you referenced is made by the company Firman and would have more than enough amperage/wattage to power the AC units you have on your travel trailer. This has a 30 amp socket like you'd need for your unit and has a 10,000 watt starting output, a 8,000 watt running output and has ability to run on propane as well. Firman generators are among the best generators out there. They are fuel efficient, quieter than most, and are very reliable.
    view full answer...
  • Total Harmonic Distortion on Firman 10,000 Watt Generator # 333-H08051
    I spoke with my contact at Firman and he said that the 10,000 Watt Portable Generator # 333-H08051 has a total harmonic distortion of 25 percent, which is pretty standard for this type of generator. For a "clean electricity" unit you will need to go with an inverter generator like the etrailer.com # 333-0003-2-0007. These 2 single generators can be ran parallel to provide 6,000 watts of starting power and 5,500 watts of running power. This is the highest rated inverter generator set...
    view full answer...
  • Does Firman 10,000-Watt Portable Generator Make a Lot of Noise
    There is not a separate muffler or silencer for the Firman 10,000-Watt Portable Generator - 8,000 Running Watts - Propane or Gas - Electric Start # 333-H08051. It is noisier than an inverter generator, measuring 74 decibels at 25 feet away, which is something akin to the level of noise of numerous household appliances, like a washing machine or dishwasher. If you are looking for something that isn't noisy I strongly recommend an inverter generator, which is quieter. The highest wattage...
    view full answer...
  • Comparing A Firman Open Frame Generator and etrailer Inverter
    The difference between the Firman 10,000-Watt Portable Generator part # 333-H08051 and the etrailer 6,000-Watt Portable Inverter Generators part # 333-0003-2-0007 is not their ability to protect from power surges as they both have this feature but rather the type of electricity they produce. The generator has a total harmonic distortion of 25 percent which means it would not be ideal for sensitive electronics such as a flat screen TV or computer. The inverters only have a total harmonic...
    view full answer...
  • Generator that Can Provide 208V 3 Phase Power
    The Firman 10,000-Watt Portable Generator # 333-H08051 that you referenced does have an outlet that can put out 208 V phase 3 power like you need so this would work well. It has a 10,000 watt output so it would do great to power a clay oven as well!
    view full answer...
  • Fuel Consumption of Firman 10,000-Watt Portable Generator # 333-H08051 Running On Propane
    You will get on LPG approx 16-24 hours running at 50% load on a standard 20lbs propane tank with the Firman 10,000-Watt Portable Generator # 333-H08051. Please keep in mind heat, elevations, can effect run times.
    view full answer...
  • Is the Firman 10,000-Watt Portable Generator Wound With 100 Copper or Aluminium Coated Copper
    I spoke to my contact at Firman and they informed me that the Firman 10,000-Watt Portable Generator part # 333-H08051 is wound with aluminium coated copper wire which gives it a harmonic distortion of 25%. If you need a lower harmonic distortion you would have to go with an inverter generator set, the etrailer 6,000-Watt Portable Inverter Generators part # 333-0003-2-0007 is the highest wattage we offer at around less than 3% harmonic distortion. In regards to longevity, the aluminium coated...
    view full answer...
  • Fuel Consumption of Firman 10,000-Watt Portable Generator # 333-H08051 on Gas and Propane
    We've checked with Firman recently about the fuel consumption of the generator part # 333-H08051 and they informed us that propane run time at 50% load is 4-6 hours on a 5 LB tank. On Gasoline the run time at 50% load can be up to 12 hours on an 8 gallon fuel tank. Using a 50 percent load is going to be the best way to get a relative amount of time since that's typically what a generator is providing.
    view full answer...
  • Can Two Propane Tanks be Connected to Firman 10,000 Watt Generator H08051
    That is a good question so I contacted the manufacturer, Firman, who told me that the Firman 10,000-Watt Portable Generator # 333-H08051 must use the regulator provided with the generator. What that means is you are unable to use two propane tanks because two tanks would require the use of a different regulator with an automatic changeover, like you asked about. Even without being able to use two propane tanks, the Firman # 333-H08051 is the most powerful, longest-lasting generator that...
    view full answer...
  • Propane Tank Compatibility with Firman 10,000 Watt Generator
    You can absolutely use a 40 lb tank with the Firman 10,000-Watt Portable Generator - 8,000 Running Watts - Propane or Gas - Electric Start # 333-H08051 you asked about. The reason why we often give a solution for two 20 lb propane tanks using an automatic changeover like the Camco Automatic Changeover 2-Stage Propane Regulator for Dual Propane Tanks # CAM59005 is simply because that is what is standard on camping trailers and that will give you uninterrupted use without getting a different...
    view full answer...
  • Recommended Generator To Plug Directly Into 50 Amp Service on 5th Wheel Trailer
    The Firman 10,000-Watt Portable Generator part # 333-H08051 which provides up to 10,000 watts of surge power and 8,000 watts of running power is going to be an excellent option to plug into your trailer as it has a 50-amp outlet that will be the same as the one at the RV park so you won't need to worry about any adapters. Furthermore, it can be run on both propane and gas for emergencies and for those who are more environmentally conscious. It also has a remote start so you don't have to...
    view full answer...
  • Will the Firman 10,000 Watt Generator Work With a Miller 200 Wire Feed Welder
    In order to confirm with absolute certainty, I would need to know the exact model number of your welder. That said, the owner's manual should have the power requirements that you need to be able to determine if you can use the Firman 10,000-Watt Portable Generator part # 333-H08051. I did however speak with Miller and they stated that a 10,000 watt generator like the above can be used with most of their smaller wire feed welders.
    view full answer...
  • Do Generators Need to be Re-Jetted at High Altitude
    According to my contact at Firman Power Equipment, it's recommended that the generator be re-jetted if it will be consistently used at elevations greater than 8000 feet. Elevation and temperature have a large influence on the actual output of a generator. In the owner's manual, Firman lists the part numbers for the re-jet kit that can be ordered directly from them. The kits include instructions. My contact tells me that switching out the jets isnt' too difficult, and that a person with...
    view full answer...
  • Why Do Firman Generators Use Aluminum Coated Copper Wires
    Aluminum coated wires of the Firman generators like part # 333-H08051 allow for lower harmonic distortion than copper wires and also allow the wires to last longer. The lower the harmonic distortion the safer it is for electronics. This has a harmonic distortion of 25 percent. All of the Firman generators use this style of wiring. If you need a lower harmonic distortion you would have to go with an inverter generator set, the etrailer 6,000-Watt Portable Inverter Generators part # 333-0003-2-0007...
    view full answer...
  • Run Time Length For Firman 10,000-Watt Generator on Gas versus LP
    I contacted Firman directly regarding the Firman 10,000-Watt Portable Generator # 333-H08051 run times on both gas and LP. For LP, run time at 50% load is 4-6 hours on a 5 LB tank. On Gasoline the run time at 50% load can be up to 12 hours on an 8 gallon fuel tank. It's important to remember these run times can be affected by elevation, temperature, and other factors.
    view full answer...
  • Using Generators to Power RV At High Altitudes
    When you get to higher elevations (typically right in the range where you recently camped - 6,000 to 8,000 feet above sea level) generators do have a tougher time running efficiently due to a few factors but mainly because the lower oxygen density requires more airflow for the mix of air and fuel. Many generators are indeed compatible with separate "high altitude" kits that allow them to run to the best of their ability in this environment. We don't currently carry Yamaha generators...
    view full answer...
  • Power Needed for Furrion AC for Van Conversion
    I definitely appreciate both the fact that you are trying to keep your dog cool and trying to learn, though I should say there isn't going to be an air conditioner that can run indefinitely, and something that runs for long periods of time is going to use up a ton of power. So if you want to use the Furrion Chill Rooftop RV Air Conditioner # FACR14SA-BL - which will also require the Air Distribution Box for Furrion Chill RV Air Conditioner # FACT11MA-PS - powering it for long periods...
    view full answer...

Do you have a question about this Generator?




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Info for this part was:

Expert Research:
Mike L
Expert Research:
Jameson C
Installed by:
Randy B
Edited by:
Daron K
Video by:
Jonathan Y
Written by:
Alex H

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