Updated: December 22, 2020

Sportsman Gas Powered Portable Generator Review

by Charles Jasper

Product Overview

Before you start to plan your next hunting or camping trip or set out on an RV adventure, it’s so important to have a high quality portable generator that you can bring along to accompany you and your friends or family. You can also rely on a powerful portable generator for your projects out in your shop or in remote work locations.

With Sportsman’s gas-powered portable generator, you’ll have plenty of wattage to power your appliances in an RV, on a campsite or hunting pad, or even your home during an emergency power outage. It’s so easy to start up, whether it’s for the first time out of the box or the first time after months of storage.

Important safety features like the oil shutoff valve will give you the peace of mind you need to keep this generator powering your heat or AC all night long. Your family will thank you for having access to some modern amenities even while camping and your neighbors won’t mind either since this generator clocks in at less than 69 decibels.

Sportsman Dual Fuel Powered Portable Generator

Sportsman Gas Powered Portable Generator
  • 4000 starting watts
  • 3500 running watts
  • 7 HP engine runs at less than 69 dB
  • 10 hours on a full tank of gasoline
  • 20 pounds weight

Importance of Having a Portable Generator

If you’re shopping for a generator for the first time, you may not realize how convenient and sometimes necessary it is to have a portable generator. There are so many applications for a portable generator and a gas-powered portable generator like this one from Sportsman allows you to power such a high capacity. Here are just some reasons why it’s useful to have a portable generator.

  1. For camping, hiking, hunting or RV trips: just because you’re outdoors that doesn’t mean you shouldn’t have access to some of the comforts of home. With a portable generator you’ll have a reliable power source to connect to your RV to run all of its appliances without killing the RV’s battery when it isn’t running. If you’re just camping or hunting, a portable generator set up lets you have heating/cooling running to make your site more comfortable. Powered outlets also mean you can power a water pump or an air pump to make your camp setup run more smoothly. Cooking is a lot easier out in nature if you can plug in a coffee maker, an electric kettle or even a camp stove.
  2. For remote site working: if you’re a worker, a contractor or even just a homeowner considering doing some renovations, chances are you’ll find yourself needing to use power tools in an area where there’s no easy access to power. A generator comes in handy in these situations so you can keep working. You need a reliable generator that travels well and can handle the load of all your tools.
  3. For emergency preparedness: if you live in an area where hurricanes, earthquakes or other natural disasters mean you could be left without power for significant periods of time, why take the chance of having to rely on a power company to get to your area in the aftermath of a storm to restore your power? You can take matters into your own hands and rest easy knowing that you have a portable generator nearby if you need it. Keep your lights on, power your fridge or freezer to make sure your food doesn’t spoil and have easy access to the latest news updates on your television or radio. Just make sure you find a great outdoor location to set up your gas-powered generator that’s protected from any moisture.

How to Determine the Correct Wattage Amount for a Generator

Before you make a new generator purchase, it’s important that you do some pre-planning so you end up with a generator that fits your needs. Generators come in with different wattage ratings and this is the difference between what you can and cannot power with the generator. Before you choose a generator, take just a few minutes to make sure you’re getting what you need.

First it’s important to know the two different wattage ratings each generator has. Generators will list their surge (or starting) wattage as well as their running wattage. The surge/starting wattage is an initial burst of power used to start devices like air conditioning or power tools that have a motor. These devices require a higher wattage for a split second to start, then the power needed is reduced to their running wattage.

Running wattage of a generator is how much the generator can run at once. To find out if a generator is suitable for your needs, determine the starting and running wattage of the appliances you wish to power. You can learn this information by looking in the user’s manual for the product (or by searching for the user’s manual online if you no longer have your paper copy).

You can use this helpful wattage calculator to determine how much power you need for your generator. We say, it’s good to overestimate so you’re not disappointed when you’re out on an adventure, but at the same time it’s silly to spend a ton of money on a super-powered generator if you only have a couple lights to power.

Gas-Powered Generator Frequently Asked Questions

How do I power my generator?

To run your gas-powered generator, first be sure you’ve placed the generator in an outdoor, level location and the generator is in the off position with no load plugged in. Add oil to the generator before using for the first time. Remove the oil access panel and fill with appropriate oil using a funnel. When reservoir is full, replace the oil cap and access panel. Next, unscrew the fuel tank and slowly add the appropriate gasoline. Do not add gasoline to the very top.

How should I store my generator?

When the generator is not in use, store it in a cool, dry place. Do not store the generator with fuel in the tank. This is dangerous and can also cause damage to the tank.

Where should my generator be set up for use?

It’s important to find a good, outdoor spot for your generator to run safely and effectively. Your generator should be on a level, firm and sturdy surface. The generator must stay dry to function, so keep it away from rain, sprinklers or bodies of water that may emit splashing.

Since the generator may emit hot exhaust, you should place it away from all flammable materials. Give the generator ample clearance on all sides. A generator should be kept away from children and any source of flame, including cigarettes.

Do I have to ground my generator?

Yes, it’s important to ground a generator before you begin to use it. If you do not ground your generator before starting and loading it, it could result in electric shock. To ground a generator, tighten the grounding nut against a grounding wire. Connect the other end of the grounding wire to a copper or brass grounding rod. Drive the grounding rod into the earth in the vicinity of the generator. Grounding equipment may not be included with your generator. Speak with an electrician if you’re unsure of appropriate areas for grounding.

Does my generator require maintenance?

A gas-powered generator, like many motor powered tools, will require some maintenance. Properly maintaining your generator ensures that it will continue to run safely and efficiently. Failure to maintain your generator could result in damage to the generator that might not be covered under warranty. Here are some general maintenance tips for your generator.

  • Always use a generator in a cool, dry place.
  • Never use water or gasoline to clean a generator.
  • Never attempt to perform maintenance on a generator that is running.
  • Only perform maintenance on a generator that has cooled after use.
  • Clean the exterior of your generator with a damp cloth.
  • Use a vacuum or pressurized air to remove dust and debris from the generator.
  • Check the oil level, fuel level and air filter before every use.
  • Replace the engine oil after 100 hours of use.
  • Clean the air filter after 50 hours of use.
  • Check the spark plug after 100 hours of use.
  • Clean the fuel tank after 300 hours of use.

Portable Generator Information

Sportsman, the brand behind this gas powered portable generator, has been providing campers and other outdoors men with quality products suitable for outdoor living and adventure for over 30 years. They understand how essential it is that hikers, campers, hunters and backpackers have access to the proper equipment in order to make the most of their experiences.

With Sportsman, you’ll find products that have been designed and developed by knowledgeable staff that truly understands what you need to have a great time. Sportsman takes great pride in being members of the communities that they serve, so their staff often knows the exact terrain that you’ll face when using their products making them great sources of information and first hand advice.

You’ll also appreciate that Sportsman partners with outdoors and wildlife organizations to give back and to ensure that their outdoor solutions are environmentally friendly.

Sportsman’s 7 horse power portable generator is the perfect generator for camping, it would make a great addition to your campsite or out on a hunt. It’s so powerful, there’s nothing stopping this generator! Whether you have air conditioning units or appliances like refrigerators or microwaves, the Sportsman 3500/4000 watt gas powered portable generator will keep it all going like a champ.


  • 4000 surge watts and 3500 running watts powers even your higher energy appliances without overloading the engine.
  • Four stroke OHV engine is a powerful 7 horse power and runs at 3400 rpm to manage the high wattage allowance.
  • Has 4 120 volt outlets for standard household plugs, 1 120 volt RV outlet and 1 12 volt DV outlet for charging.
  • Gas powered engine features an engine shut off switch, has an automatic low oil shutdown and is EPA approved.
  • Built in gasoline tank holds 3.6 gallons of fuel and is capable of running for 10 hours at half load.
  • Spark plug is included.
  • Uses recoil start so no battery necessary.
  • 1 year warranty


  • This unit isn’t designed to fit on a mobility unit and it is heavy (around 90 pounds) so transportation requires some muscle.
  • Can be noisy depending on the load you’re running.
  • Oil must be purchased separately.

How to Start Your Sportsman 4000 Gen Portable Generator

  1. Remove all packaging from the generator.
  2. Ground the generator.
  3. Fill oil reservoir until almost overflowing (the generator will not run if there’s not enough oil). Use 18.6 ounces of SAE 10W-30 oil.
  4. Add fuel to the tank. Be sure to use octane gas rated 87 or higher.
  5. Place the generator outdoors in a well ventilated area.
  6. With no outlets plugged in to the generator, turn the engine on off switch to the on position.
  7. Turn the fuel petcock to the on position (knob pointing down).
  8. Adjust the choke lever to the closed position.
  9. Using the recoil pull, start the generator by hand.
  10. Once the engine has started, slowly move the choke lever to the open position to level the engine.
  11. Allow the engine to run for at least 5 minutes to warm up before adding any load to the generator.


A great, reliable generator will take you far- whether it’s on an outdoor adventure or through the eye of a storm. Sportsman’s 3500 watt portable generator is a great choice for multiple different applications.

About the author

Charles Jasper is the owner and main author of Generator Guider. He has a degree Engineering and 20 years experience on using generators on various projects, around the house, and while traveling and camping. He has a passion for everything related to home improvemen and loves to travel on his RV. When he is not working, you might find Jasper working on projects around the house or organizing a camping trip.