Product images: Amazon listings
Written from the listing's specs, not from our own use · How we rate
We like the Generac 6,875W Gas EFI for the mix: 6,875 peak watts, a built-in CO sensor and push-button electric start. Think of it for keeping the fridge and the sump pump running: 7.0/10 on what its listing documents.
These are sold as variants of one listing family. Each variant has its own page.
| Brand | Generac |
|---|---|
| Category | Gas-only generators |
| Peak output | 6875 W |
| Listed fuels | gasoline |
| Stated runtime | Up to 11 hours at 50 % load |
| CO sensor | Stated in the listing |
| Fuel injection (EFI) | Stated in the listing |
| ASIN | B0FHL1NC4S |
Full listing title: Generac 6,875 Starting Watt Portable Gas Generator, with EFI and Handle Kit
| Peak output | Exact listing |
|---|
Rated from the listing's specs, no buyer reviews yet
What it's made for: keeping the fridge and the sump pump running.
Two generators that are also open frames, of about the same size, closest to it on our rating, each with a dated price.
The listing states only the peak, the figure for the few seconds a motor starts. Ask for the running watts before you build your load list on it.
What it has going for it
CO sensor. A sensor that watches the carbon monoxide around the unit, per the listing. Treat it as a backup: the generator still belongs outside, about 20 ft from doors and windows.
Electric start. A button instead of a pull cord, which matters at 5 a.m. in sleet. Keep the battery topped up between storms (a trickle charger does it).
What the Generac 6,875W Gas EFI listing names:
The manual for the Generac 6,875W Gas EFI has the final word on fuel, oil and outlet ratings.
On Sep 30, 2026, that price put it in the pricier third of the 21 generators of 4,000 to 8,000 running watts we have a recent price for.
Count the hookup in the budget too: a heavy cord, an inlet box and a transfer switch or interlock, wired by an electrician, are a separate bill.
The button opens the exact listing (ASIN B0FHL1NC4S), where today's price, stock and seller apply. Sizes and variants of the same family often sit at different prices.
Want it quieter, or cleaner power for electronics? The Westinghouse 8,200W Tri-Fuel Inverter (7.3/10) is an inverter, per its listing.
Want propane as a backup fuel? The Westinghouse 6,500W Dual Fuel (7.7/10) runs on gasoline and propane.
Want a CO shutoff? The WEN DF8000X (7.5/10) names a CO sensor that shuts the engine off.
Our take
The Generac 6,875W Gas EFI earns its place with 6,875 peak watts and a built-in CO sensor. No buyer reviews yet, so the Generac 6,875W Gas EFI has to win you over on paper. Honestly, the catch: no word on the running watts. We'd pick this Generac generator if kids or pets in the house make CO safety a must; otherwise, put it next to the Generac 10,000W Gas first.
Fill it with oil before the first start, then run it for a few minutes outside with a small load.
Push the start button, let it warm up, then add loads one at a time, the biggest motor first. Keep stabilised cans ready, never refuel it hot. The 11 hours on the listing are at a light load; plan a refill at night.
Run it every month or so for 20 minutes and keep the battery charged. With fuel injection there is no carburetor to gum up, but stale gas still hurts; add stabiliser. Our maintenance schedule has the full list.
First oil change after the break-in hours in the manual (the hour meter counts them), then on schedule. Air filter and spark plug once a season, and a cover for the months it sits.
Before you order the Generac 6,875W Gas EFI, check the running watts: the listing gives only a 6,875 W peak figure, and the running figure is what decides what it can carry.
Write down what has to run at the same time, add the biggest motor surge (well pump, sump pump, AC), and let our sizing calculator do the sums.
Plan on heavy-duty extension cords to the appliances, or ask an electrician which inlet and switch would match its outlets. Our interlock vs transfer switch guide compares the two routes.
Outside only, about 20 ft from doors, windows and vents, exhaust pointing away (the CO sensor is a backup, not a permission). Pick the spot now, before the storm. Our CO safety and placement guide has the details.
Gasoline goes stale in a few months: stabiliser, a dry place for the cans, and a run every month or so keep it ready. Our fuel storage guide and maintenance schedule cover both.
How the Generac 6,875W Gas EFI stacks up against the closest alternative, the Generac 10,000W Gas.
| Criterion | Generac 6,875W Gas EFI | Generac 10,000W Gas |
|---|---|---|
| Our rating | 7.0/10 | 7.0/10 |
| Peak watts | 6,875 W | 10,000 W |
| Runtime | 11 h at 50 % | 12 h at 50 % |
Both score 7.0/10. The Generac 10,000W Gas adds a higher peak (10,000 W) and a longer stated runtime (12 h).
We rate it 7.0/10 (good). The rating comes from its documented listing alone, as no customer-review record is captured yet.
The listing or manual states 6,875 W peak, usually for gasoline. Size your load list against the running watts and keep the peak for motor starts; propane and natural gas ratings are lower. These are the seller's figures, not our measurements (our sizing calculator turns your loads into a running and peak pair).
The listing names gasoline. Run it outdoors only, away from doors, windows and vents.
Its listing states 6,875 peak watts, a built-in CO sensor, push-button electric start, up to 11 hours per tank at 50 % load and fuel injection (no carburetor to gum up). These are the seller's figures, not our measurements: how loud it is in your driveway and how it handles your well pump's surge can't be read from a listing.
Your load list: write down what has to run at the same time, add the biggest motor surge (well pump, sump pump, AC), and let our sizing calculator do the sums. How it reaches the house: plan on heavy-duty extension cords to the appliances, or ask an electrician which inlet and switch would match its outlets. Our interlock vs transfer switch guide compares the two routes. Where it will run: outside only, about 20 ft from doors, windows and vents, exhaust pointing away (the CO sensor is a backup, not a permission). Pick the spot now, before the storm. Our CO safety and placement guide has the details. Fuel and storage: gasoline goes stale in a few months: stabiliser, a dry place for the cans, and a run every month or so keep it ready. Our fuel storage guide and maintenance schedule cover both.
We link to the exact listing on Amazon, where today's price, stock and seller apply. It is an affiliate link, and it has no effect on the rating.
No, we haven't used it ourselves. Everything on this page comes from its listing, read line by line and weighed with our published formula, plus our editors' read of how it compares with its rivals.