Generac 3600 (7721)
A gas portable generator rated at 3,600 running and 4,500 starting watts, with a 3.7-gallon tank and up to 9.3 hours of runtime at half load. It shuts itself off if carbon monoxide builds up.
- Running watts
- 3,600 W
- Starting / surge watts
- 4,500 W
- Fuel
- gasoline
- Best for
- Jobsites, tools and basic home backup on a budget.
- Not for
- Quiet campgrounds and RV parks, since it is an open-frame, non-inverter design. Buyers in California, as it is not CARB compliant.
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Specifications
| Running watts | 3,600 W |
|---|---|
| Starting / surge watts | 4,500 W |
| Fuel | gasoline |
| Inverter (clean power) | No |
| Runtime at 50% load | 9.3 h |
|---|---|
| Fuel tank | 3.7 gal |
| Weight | 105 lb |
|---|---|
| Length | 24 in |
| Width | 22.5 in |
| Height | 21.3 in |
| CO safety shutoff | Yes |
|---|---|
| CARB compliant | No |
Checked 29 October 2026. Sources: generac.com.