Generac 18000 EFI (8917)
A gas portable generator rated at 18,000 running and 22,500 starting watts, with a 14.2-gallon tank and up to 9 hours of runtime at half load. It shuts itself off if carbon monoxide builds up.
- Running watts
- 18,000 W
- Starting / surge watts
- 22,500 W
- Fuel
- gasoline
- Best for
- Heavy jobsite and home backup loads.
- Not for
- Quiet campgrounds and RV parks, since it is an open-frame, non-inverter design. Carrying by hand: it weighs 442.8 lb.
Paid link: we may earn a commission if you buy through it, at no extra cost to you.
Specifications
| Running watts | 18,000 W |
|---|---|
| Starting / surge watts | 22,500 W |
| Fuel | gasoline |
| Inverter (clean power) | No |
| Runtime at 50% load | 9 h |
|---|---|
| Fuel tank | 14.2 gal |
| Weight | 442.8 lb |
|---|---|
| Length | 39.5 in |
| Width | 30.9 in |
| CO safety shutoff | Yes |
|---|---|
| CARB compliant | Yes |
Checked 29 October 2026. Sources: generac.com.