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Customer reviews for Generac 8917 GP18000EFI 18,000-Watt Gas-Powered Electric-Start Portable Generator for
Generac 8917 GP18000EFI 18,000-Watt Gas-Powered Electric-Start Portable Generator
4.6 out of 5 stars
stars
1,715 ratings1,715 reviews
  1. 5 stars78% (1,346)
  2. 4 stars15% (250)
  3. 3 stars2% (40)
  4. 2 stars1% (20)
  5. 1 star3% (59)

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Showing 51-60 of 1,715 reviews
Aug 28, 2025
Reviewer name: pom_mom_7543
5 out of 5 stars
5 out of 5 stars review

This generator is a beast

[This review was collected as part of a promotion.] The Generac GP9500E Tri-Fuel is a fortress of reliable portable power. It stands out for its substantial output, multi-fuel adaptability, and safety focus. While it leans into simplicity over tech-savvy features and isn’t the lightest or most efficient, it packs an outstanding value for serious backup power needs.

Review from influenster.com
Helpful?698EZRGTDSV513631905214
Sep 10, 2025
Reviewer name: Buy This
5 out of 5 stars
5 out of 5 stars review

Great Features

I bought the GP8000E to replace my Honda 7000 that was over 25 years old. The setup was relatively straight forward except for attaching the battery cables. When I unclipped the zip tie holding the battery leads for shipping, I didnt notice that the power connector for the starter had become disconnected, probably when I cut the zip tie. I called Generac Support as the electric start was not working and they had me check all the connections including the power connector for the starter. I connected it and the generator started right up. I've only had it for a month but I love it as its easy to operate.

Review from generac.com
Helpful?698EZRGTDSV513631905214
Sep 10, 2025
Reviewer name: BigBird1
4 out of 5 stars
4 out of 5 stars review

Great, dependable product

Purchased to replace a 12 year old Generac 6500 that I use for emergency power. As I live along the Gulf Coast it doesn’t take a hurricane for us to loose power. Ran 8 days on generator power Zeta and the ol’ Generac didn’t miss a beat. After quick final assembly, oil and fuel this new unit fired up on the second pull. Looking forward to not having to concern myself about power loss for another 13 years!

Review from generac.com
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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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Sep 16, 2025
Reviewer name: DDDD5555
3 out of 5 stars
3 out of 5 stars review

Works fine, but super-loud

In reality, I only used this for about 20 minutes when the power came back on. This replaces a very old generator that had half the power. Aside from it working well, I can certainly say this generator is deafeningly-loud. Keeping it outside means you typically won't be bothered by it, but it makes you wonder if they could have improved the muffler.

Review from generac.com
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Sep 10, 2025
Reviewer name: CMelectric
5 out of 5 stars
5 out of 5 stars review

Bad Features I am an Electrical Contractor

I had Purchased This Unit From CED in Hudson on May 14th 2025. Brought it home Installed proper gas and oil Tried to start it it started for a few seconds so I called Generac They told me to take it to be serviced at MacDaddy's Small engine repair in Land O lakes. They still have it there, It had faulty Parts. Your Company would not replace it.

Review from generac.com
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Jan 29, 2026
Reviewer name: chrisfromct
5 out of 5 stars
5 out of 5 stars review

Overall, very good quality and features.

Just bought this a month ago and haven't had the need to use it yet. But I did have to assemble the handle, wheels, add oil and gas and start it. My review is solely based on that. The wheels were relatively easy to assemble, keeping in mind that the machine is heavy and you will need to lift it on blocks, or use a helper. They give you a perfectly shaped funnel to add the oil. Don't lose it. The handles are easy to install and conveniently fold down when not in use. They make it very easy to roll around on the two wheels. You also need to connect the battery wires, which they don't explain very well. Remember Red is positive, Black is negative. My only gripe is with the gas tank cover, though. It is very large, and very low profile, and it is in a sunken area of the tank. It is very difficult to get a grip on it to remove as it is also very tight. Why did they make it like this? I've never had any machine have a cap like this. It does have a convenient fuel level bubble. The gas tank is 8 gallons, not just 5 like my older model. It is rated at a continues 8KW, although the 240V 4-prong cable that connects to the breaker panel is only capable of carrying 7.2KW. You need to use the 2 120V outlets to get a total of 8KW. Keep in mind that the battery does not get recharged by running the engine. You have to use the included wall charger. Although, a single start is not going to use much power, so you don't need to worry too much about always keeping the wall charger connected. But definitely charge it fully when it is new. It has picture-based instructions on the frame. But they aren't very useful as they pictures are too small to figure out what they are saying. Remember to turn the fuel shutoff to ON and set the choke to ON when starting it.

Review from generac.com
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Jan 29, 2026
Reviewer name: Pottsville
2 out of 5 stars
2 out of 5 stars review

Didn't even get a chance to use it/ it failed.

I bought this new generator new in the box for our deer camp. We unboxed it and added the oil and clean gasoline and started it. It was gushing gas out of the carb so we had to shut it down. When we called Menards to bring it back for an exchange they said that they don't take them back and we had to bring it to a certified repair shop that was 75 miles away from our camp. Needless to say, we didn't have a generator for deer season because the repair shop was booked. When I picked it up the owner said that the carb was full of gunk and that he couldn't even charge Generac for the repair because it was a fuel issue. how could that be possible when it was brand new out of the box? I am very disappointed that we have a generator that could be a lemon and the repair shop didn't get paid!

Review from generac.com
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Jan 25, 2017
Reviewer name: PrepareTX
4 out of 5 stars
4 out of 5 stars review

Verified Purchase

Bought for Hurricane Season

I bought this unit ahead of time to be prepared for Hurricane season. I haven't had to use it yet. I just run it about one a month to keep it up.

Review from generac.com
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Jan 28, 2017
Reviewer name: Myoder
4 out of 5 stars
4 out of 5 stars review

Verified Purchase

Ease of use

I realy like the ease of starting generater,also the apperance. What i would change would be add a remote start.

Review from generac.com
Helpful?698EZRGTDSV513631905214