Sportsman · Portable generator · Model GEN4 / GEN4000
GEN4 / GEN4000
4000 Surge Watt Gasoline Portable Generator
Infographic gallery
Output, fuel flexibility, runtime, and ownership.
4,000W maximum starting output
Bars compare published running and starting capacity. Gaseous-fuel output may be lower than gasoline output.
Gasoline
Model-specific fuel system and published half-load performance.
Fuel capacity
3.6 gal
Published runtime
10 hours at 50% load
91 lb
Product weight
23 × 19.5 × 17.5 in
Published dimensions
- Observed price
- $279.99
- Retailer
- Tractor Supply Co.
- Availability
- Current listing available
Starting
Recoil
Voltage
120V AC / 12V DC
Low-oil shutdown
Published
CO shutdown
Not listed
Official product gallery
Product views and manufacturer graphics.
Sportsman and Buffalo Corporation’s current image set shows the model, power panel, fuel configuration, and published feature graphics.
Complete specifications
The fields that matter for comparison.
Output, engine, fuel, runtime, outlets, sound, size, weight, safety, price, and warranty fields are drawn from Sportsman’s current pages and current retailer listings. Conflicting source revisions are labeled instead of silently blended.
Product overview
A value-focused open-frame gasoline generator with RV-ready output, 10-hour half-load runtime, automatic voltage regulation, and low-oil shutdown.
Electrical output by fuel
- Gasoline output
- 3,500W running / 4,000W starting
- Voltage
- 120V AC / 12V DC
- Outlets
- 4 × 120V AC; 1 × 120V RV; 1 × 12V DC
- Automatic voltage regulation
- Yes
- Parallel capability
- Not listed for this model
Engine, fuel & runtime
- Engine
- 212cc, 7.0 HP, 4-stroke OHV
- Starting system
- Recoil
- Fuel options
- Gasoline
- Fuel capacity
- 3.6 gal
- Published runtime
- 10 hours at 50% load
- Sound rating
- <69 dB at no load
- Oil
- SAE 10W-30; 18.5 fl oz
Portability, protection & ownership
- Product weight
- 91 lb
- Dimensions
- 23 × 19.5 × 17.5 in
- Carbon-monoxide shutdown
- Not published for this model
- Low-oil shutdown
- Yes
- Compliance
- EPA approved; non-CARB retailer listing
- Warranty
- 1-year limited
- Price and availability
- Tractor Supply Co. observed price: $279.99 (was $329.99)
- Sportsman model
- GEN4 / GEN4000
Feature details
Portable open-frame output
The open-frame platform emphasizes airflow, access, RV-ready connections, and value-oriented backup power.
Gasoline simplicity
A dedicated gasoline system keeps startup and refueling familiar while providing the model’s full published output.
Engine protection
Low-oil shutdown helps protect the engine, while circuit protection manages connected electrical loads.
RV-ready connections
A dedicated 120V RV outlet is included alongside household and DC connections.
Best-fit uses
- Home essentials
- RV and camping
- Jobsite tools
- Outdoor events
Standout features
- 4,000W starting / 3,500W running on gasoline
- Gasoline
- Automatic voltage regulation
- Low-oil shutdown
Match it to the equipment you’ll actually run.
Use the independent wattage calculator before buying.