Sportsman · Portable generator · Model GEN4000TRI
GEN4000TRI
4000 Surge Watt Tri-Fuel 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 + propane + natural gas
Model-specific fuel system and published half-load performance.
Fuel capacity
3.6 gal gasoline; external LPG/NG supply
Published runtime
10 hours gasoline / 12 hours LPG at 50% load
90 lb
Product weight
24.5 × 18.75 × 19.5 in
Published dimensions
- Observed price
- $639.99
- 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 compact tri-fuel generator for gasoline, propane, or natural-gas operation with RV-ready output and published derating guidance for gaseous fuels.
Electrical output by fuel
- Gasoline output
- 3,500W running / 4,000W starting
- Propane output
- 3,150W running / 3,600W starting — Sportsman states output may be reduced by 10% on propane.
- Natural gas output
- 2,800W running / 3,200W starting — Sportsman states output may be reduced by 20% on natural gas.
- 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 + propane + natural gas
- Fuel capacity
- 3.6 gal gasoline; external LPG/NG supply
- Published runtime
- 10 hours gasoline / 12 hours LPG at 50% load
- Sound rating
- <68 dB at 24 ft, no load
- Oil
- SAE 10W-30; 18.5 fl oz
Portability, protection & ownership
- Product weight
- 90 lb
- Dimensions
- 24.5 × 18.75 × 19.5 in
- Carbon-monoxide shutdown
- Not published for this model
- Low-oil shutdown
- Yes
- Compliance
- EPA approved; non-CARB
- Warranty
- 1-year limited; 2-year emissions
- Price and availability
- Tractor Supply Co. observed price: $639.99 (was $799.99)
- Sportsman model
- GEN4000TRI
Feature details
Portable open-frame output
The open-frame platform emphasizes airflow, access, RV-ready connections, and value-oriented backup power.
3-fuel flexibility
This model supports gasoline + propane + natural gas. Published gaseous-fuel output may be lower than gasoline 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
- Fuel-flexible home backup
- RV and camping
- Food trucks and events
- Jobsite tools
Standout features
- 4,000W starting / 3,500W running on gasoline
- Gasoline + propane + natural gas
- Automatic voltage regulation
- Low-oil shutdown
Match it to the equipment you’ll actually run.
Use the independent wattage calculator before buying.