Product Description
The Generac 7706 Gas Powered Portable Generator 49ST is a powerful commercial and residential portable generator built for heavy-duty backup power, jobsite use, outdoor projects, and emergency home support. Designed under Generac’s GP18000EFI Series, this generator delivers 18,000 running watts and 22,500 starting watts, making it suitable for high-demand tools, appliances, equipment, and essential household circuits.
Powered by a large 816cc EFI engine, the Generac 7706 provides strong output performance with efficient fuel delivery and dependable starting. The EFI system helps improve fuel management and engine response compared to traditional carbureted systems, making it a premium choice for demanding portable power applications.
This generator is built with True Power Technology, helping deliver cleaner power with low total harmonic distortion for sensitive electronics, tools, appliances, and home equipment. It also includes COsense technology, which helps monitor carbon monoxide levels and shut the generator down when unsafe CO conditions are detected.
The generator includes a heavy-duty steel tube frame, large fuel tank, built-in fuel gauge, hour meter, electric start, low-oil pressure shutdown, never-flat wheels, and folding locking handle for improved portability. With multiple 120V and 120/240V outlets, this generator is ready for serious backup power and worksite performance.
The Generac 7706 GP18000EFI 49ST Portable Generator is ideal for customers who need high-output portable power for home backup, commercial use, emergency outages, construction jobs, farm use, and outdoor equipment. This product is brand new, includes free shipping all over the USA, and comes with a 3 Years Limited Warranty.
Key Features
18,000 Running Watts
Provides 18,000 running watts for heavy-duty power needs, large appliances, power tools, equipment, and backup circuits.
22,500 Starting Watts
Delivers 22,500 starting watts to support motor-driven appliances and tools that require extra power during startup.
816cc EFI Engine
Large 816cc electronic fuel injection engine provides strong power output, smooth operation, and efficient fuel delivery.
True Power Technology
Designed to deliver cleaner power with low harmonic distortion, making it suitable for many sensitive electronics and appliances.
COsense Technology
COsense technology helps protect users by detecting hazardous carbon monoxide buildup and shutting the generator down when unsafe levels are detected.
Electric Start
Electric start system provides easier startup compared to manual-only generators.
Large 14.2 Gallon Fuel Tank
The 14.2-gallon fuel tank supports extended runtime for backup power, worksites, and long operating periods.
9 Hour Runtime at 50% Load
Runs up to 9 hours at 50% load, making it suitable for long outages or extended work sessions.
Heavy-Duty Steel Frame
Built with a hardened steel tube cradle for strength, durability, and protection during transport or jobsite use.
Multiple Power Outlets
Includes multiple 120V and 120/240V receptacles for powering appliances, tools, transfer switch connections, and heavy-duty electrical loads.
Low-Oil Pressure Shutdown
Low-oil shutdown helps protect the engine from damage during operation.
Never-Flat Wheels
Heavy-duty 12-inch never-flat wheels make it easier to move the generator across garages, driveways, shops, and worksites.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | Generac |
| Series | GP Series |
| Model Name | GP18000EFI |
| Model Number | 7706-0 |
| Configuration | EPA / 49-State |
| Generated SKU | GEN-7706-GP18000EFI-49ST-001 |
| Product Type | Gas Powered Portable Generator |
| Condition | Brand New |
| Running Watts | 18,000W |
| Starting Watts | 22,500W |
| Rated AC Voltage | 120/240V AC |
| Rated AC Frequency | 60 Hz |
| Rated VAC Amperage | 75 / 150 |
| Engine Displacement | 816cc |
| Engine Type | OHVI |
| Fuel System | EFI |
| Engine RPM | 3600 RPM |
| Recommended Oil | 10W-30 / SAE 30 |
| Oil Capacity with Filter Change | 2.2 qt. / 2.1 L |
| Oil Capacity without Filter Change | 2.0 qt. / 1.95 L |
| Lubrication Method | Oil Pump |
| Automatic Voltage Regulation | Yes |
| Starting Method | Electric Start |
| Battery Included | Yes |
| Battery Type | Group U1 |
| Low Oil Shutdown | Low Pressure Shutdown |
| Fuel Gauge | Built-In Tank Fuel Gauge |
| Fuel Tank Capacity | 14.2 gal. / 54.0 L |
| Runtime at 50% Load | Up to 9 Hours |
| Handle Style | Folding, Locking Handle |
| Wheel Type | 12 in. Never-Flat Wheels |
| Neutral Bonding | Neutral Bonded to Frame |
| Unit Dimensions | 58.5 in. L x 30.9 in. W x 36.5 in. H |
| Unit Weight | 439.2 lbs |
| Shipping Weight | 469.2 lbs |
| Shipping | Free Shipping All Over the USA |
| Warranty | 3 Years Limited Warranty |
Outlet Configuration
| Outlet / Control | Details |
|---|---|
| Main High-Power Outlet | 1 x 120/240V AC 50A Receptacle, NEMA 14-50R |
| Duplex Outlets | 2 x 120V 20A 5-20R Duplex Outlets |
| 120V Locking Receptacle | 1 x 120V AC 30A Locking Receptacle, NEMA L5-30R |
| 120/240V Locking Receptacle | 1 x 120/240V AC 30A Locking Receptacle, NEMA L14-30R |
| 50A Circuit Breaker | 1 x 120/240V 50A 2-Pole AC Circuit Breaker |
| 30A Circuit Breaker | 1 x 120/240V 30A 2-Pole AC Circuit Breaker |
| 120V Circuit Breakers | 2 x 120V 20A 1-Pole AC Circuit Breakers |
| Hour Meter | Included |
| Start Switch | Off / Run / Start Switch |
| COsense Indicators | Red Hazard Light and Yellow Fault Light |
| Malfunction Indicator Light | Included |
| Fuel Gauge | Built into fuel tank |
Power / Performance Configuration
| Component | Details |
|---|---|
| Generator Series | GP18000EFI |
| Power Output | 18,000 running watts / 22,500 starting watts |
| Engine | 816cc EFI OHVI engine |
| Voltage | 120/240V AC |
| Frequency | 60 Hz |
| Runtime | Up to 9 hours at 50% load |
| Fuel Tank | 14.2 gallons |
| Starting System | Electric start |
| Safety System | COsense and low-oil shutdown |
| Portability | Folding handle and 12 in. never-flat wheels |
| Best Application | Home backup, jobsite power, commercial use, and emergency power |
What’s Included
| Included Item | Details |
|---|---|
| Generac 7706 GP18000EFI Portable Generator | Brand new generator unit |
| 816cc EFI Engine | Installed |
| Electric Start System | Installed |
| Battery | Included |
| Engine Oil | Included |
| Heavy-Duty Steel Frame | Included |
| Folding Locking Handle | Included |
| 12 in. Never-Flat Wheels | Included |
| Built-In Fuel Tank and Fuel Gauge | Included |
| COsense Technology | Included |
| Hour Meter | Included |
| Outlet Control Panel | Included |
| Owner’s Manual | Setup, operation, maintenance, and safety guide |
| Warranty Coverage | 3 Years Limited Warranty |
Ideal Applications
The Generac 7706 Gas Powered Portable Generator 49ST is ideal for home backup power, emergency outages, commercial work, construction jobs, farms, workshops, large tools, heavy equipment, outdoor projects, refrigerators, freezers, sump pumps, lights, heaters, charging systems, and transfer switch power support.
It is especially useful for customers who need a high-output portable generator with electric start, strong engine power, multiple outlets, long runtime, and heavy-duty jobsite durability.
Warranty Information
This product includes a 3 Years Limited Warranty for residential use. Warranty coverage applies to eligible manufacturer defects under normal approved use. Warranty does not cover misuse, lack of maintenance, fuel-related issues, improper storage, overload damage, weather damage from improper protection, unauthorized modification, accidental damage, or normal wear parts.

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