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Customer reviews for 10,000/8,000- Watt Generac Gas-Powered Portable Generator With CO Sensor + Electric Start / 25ft Extension Cord for
10,000/8,000- Watt Generac Gas-Powered Portable Generator With CO Sensor + Electric Start / 25ft Extension Cord
4.6 out of 5 stars
stars
1,862 ratings1,804 reviews
  1. 5 stars78% (1,454)
  2. 4 stars14% (269)
  3. 3 stars3% (48)
  4. 2 stars1% (24)
  5. 1 star4% (67)
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Showing 501-510 of 1,804 reviews
Apr 2, 2015
Reviewer name: Goldenbuckeye
5 out of 5 stars
5 out of 5 stars review

Solid & Effective

A portable, reliable, economical, means of standby power. It is a bit louder than I like but wear earplugs if you are bothered by the noise level. This machine is used for jobsite applications such as a vacuum,portable halogen lighting and misc. charging. Follow the wattage charts for appliance applications to ensure you have the right size generator to handle the load required. Do not overload any machine even a Generac.

Review from generac.com
Helpful?5QX50PEVBRFY13572122433
Apr 10, 2014
Reviewer name: Bill
5 out of 5 stars
5 out of 5 stars review

Impressive machine

This thing is a beast. I connected to a manual transfer switch with current monitors to watch and balance the connected load. I have run a few tests but haven't had a true outage yet to put it to the test. V-twin 992cc engine runs great and starts easily with the electric start. I did connect a battery tender to trickle charge/monitor the battery. Other than that it comes with everything including a spare tune up kit.

Review from generac.com
Helpful?5QX50PEVBRFY13572122433
Sep 10, 2025
Reviewer name: VKA2
1 out of 5 stars
1 out of 5 stars review

Poor Warranty Assistance

Purchased this portable generator, had a problem with it after 15 min. of running.. Called for assistance and No One would come to my house to repair it. They only would come if it was a standby generator. I like Generac Products but my was 450 pounds and I could not service it myself. Plus it was under warranty.

Review from generac.com
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Jan 2, 2012
Reviewer name: Beckis
5 out of 5 stars
5 out of 5 stars review

Powers almost whole house!

I researched a host of generators before deciding on the Generac GP6500. For me the Generac brand was the deciding factor and the GP6500 was the largest wattage I could fit into my budget. It was shipped promptly and arrived without so much as a scratch on the box. Assembly was quick and easy. Had a transfer switch(6 breaker) installed and everything in the house is usable except central air and washer and dryer. The generator started up on second pull and roared like a lion but powered everything I wanted it to power with room for more. I couldn't be happier. Almost looking forward to the next power outtage because I am ready for it now. I have not seen anything on this generator that is not well built and ready to last for a long time.

Review from generac.com
Helpful?5QX50PEVBRFY13572122433
Nov 27, 2017
Reviewer name: Superjetta
5 out of 5 stars
5 out of 5 stars review

A Work Horse

We purschased this generator back in first days of October, after huriacane Maria hit our island in Puerto Rico. Worked more than 10 hours nightly cause power went out in my house from September 20 and came back Novemeber 20. Worth every dollar we paid, if you do the maintanience punctually you"ll get the best of him. We are firts time buyers and we recomend Generac to friends. Pay for quality.

Review from generac.com
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Oct 15, 2018
Reviewer name: Ray
5 out of 5 stars
5 out of 5 stars review

Mighty Powerful Standby

First of all Generac is the best. I have purchased many industrial generators for hospital backup. I know that Generac is quality. This unit meets all my needs for home backup without having to go to s standby unit. It was easy to assemble and started right off the bat. Much quieter than expected for its size. This unit is well built and I am sure will last me a lifetime. Fuel tank capacity and placement are optimal and I really like the built in strainer. I am very please with this purchase.

Review from generac.com
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Feb 13, 2015
Reviewer name: mechaniczz1
5 out of 5 stars
5 out of 5 stars review

Simple/easy/user friendly

I just picked up this generator under the strong recommendation from an electrician. Fantastic advice. As mentioned above it is easy to use and laid out quite simple. I find it to be built solid and durable. I love the electric start feature as well as the pull start in the event the battery is too weak to crank the engine. Battery came charged when I received it and even though we had temps at -20 to -30 all month she still fired up quite easily. Highly recommend this generator.

Review from generac.com
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Apr 18, 2025
Reviewer name: Andrewfl
2 out of 5 stars
2 out of 5 stars review

POOR WARRANTY AND PRODUCT

I bought this generator just under a year ago. We were expecting power outages up to several weeks. Glad that we weren't effected. The reason for my 2 stars is the Generator is supposed to have a great warranty. Buyer beware, after putting the generator together and trying to start it the generator failed to start. I called to have someone to come out to check the generator and was told that I had to bring it to a place. So a generator that weights over 100lbs with a full 7 gal tank of fuel they expected me to transport over 25 miles to have it serviced. I would NEVER buy another product from this company.

Review from generac.com
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Oct 11, 2018
Reviewer name: Adam12hicks
5 out of 5 stars
5 out of 5 stars review

Excellent generator. First time owner, couldn’t have been easier!

[This review was collected as part of a promotion.] I haven’t used a modern generator before - last one we had was 25 years old, was noisy, shaky, and we’d wear ourselves out getting it to start. Oh, and then there was the exhaust, smoke and low current. Not anymore! This thing is a dream. Arrived well packaged and was a breeze to set up. Basically you attach the wheels, front rests and handle and it’s ready to go. Well you add oil (included, along with a handy funnel) From there, startup instructions are well documented in the book AND on the generator itself. I really appreciate that there are easy to follow graphical steps on the unit itself for starting and running the unit. A few quick pulls and it was purring like a kitten. I haven’t had a chance to put too much load on it, but so far it’s easily powered everything I’ve thrown at it! The unit is heavy, feels like everything is high quality, and I expect it to last a long time. Definitely recommend!

Review from generac.com
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Oct 2, 2018
Reviewer name: SeramaMama13
5 out of 5 stars
5 out of 5 stars review

Great Generator with lots of safeguards

[This review was collected as part of a promotion.] The GP6500 CO-SENSE Portable Generator is really great. The machine is easy to put together, easy to use, works well, and provides many safeguards and creature comforts that are really nice to have. This unit was easy to put together, the instructions are clear and it comes with everything you need to get started. One of my favorite things about this unit is the CO-Sense Technology. Carbon monoxide is terrifying but this unit is engineered to protect against that by automatically shutting off when unsafe levels are detected. Then it alerts you about it. Another important feature is the hour meter tracker, it counts down and lets you know when the machine should be serviced. Another cool feature is the low-oil safeguard. It will automatically shut off if the fuel level gets too low. All of these safeguards are so extremely nice to have. In previous units I've owned, there were not reminders or safeguards. It's nice to know exactly what to do and when to do it with this unit. Not only is this generator easy to put together, easy to use, and comes with awesome features, it actually runs really well and does a great job at providing the energy needed to run necessary components of my home. I'm extremely happy with this unit. I love all of the safeguards, how easy it is to use, and how well it works. I would absolutely recommend it!

Review from generac.com
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