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Standard Features
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The G120 is big on power and features to meet your market and job site needs. This durable, sound attenuated diesel generator provides mobile prime power for larger construction, commercial, industrial, special event and emergency management applications where quiet, reliable power is needed. The digital controller monitors and protects the generator and engine. The standard environmentally friendly features include a 115% fluid containment, crankcase oil vapor recovery system, no mess oil and radiator drain hoses and fast fuel fill system that minimizes fuel spill potential.


Wacker Neuson
Model Year
G120 (T4i)
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Engine Make
Engine Type
4-cylinder, Tier IV interim
173 hp (129 kW) @ 1,800 rpm
272 cu. in. (4,500 cm³)
Fuel Type
Fuel Tank Capacity
199.8 gal. (756 l)
Oil Capacity
15.3 qt. (14.5 l)
(2) 12V


Rated AC Output
Standby: 106 kW
Prime: 96 kW
Rated AC Current
120 / 240V
AC Frequency
60 Hz
Continuous Operating Hours
26.3 hrs. at 100% prime load
33.4 hrs. at 75% prime load
45.3 hrs. at 50% prime load
69.2 hrs. at 25% prime load


Skid - Operating: 110 in. (2,794 mm)
Skid - Shipping: 113 in. (2,870 mm)
With Trailer: 176 in. (4,470 mm)
Skid - Operating: 66.3 in. (1,685 mm)
Skid - Shipping: 78.4 in. (1,993 mm)
With Trailer: 90 in. (2,286 mm)
Skid - Operating: 45 in. (1,143 mm)
Skid - Shipping: 47.5 in. (1,207 mm)
With Trailer: 80 in. (2,032 mm)
Skid - Dry: 4,830 lbs. (2,190 kg)
Skid - Operating: 6,268 lbs. (2,843 kg)
Skid - Shipping: 5,017 lbs. (2,275 kg)
With Trailer - Operating: 7,638 lbs. (3,464 kg)
With Trailer - Shipping: 6,200 lbs. (2,812 kg)


(2) 20A GFI duplex; (3) 50A twist lock

Standard Features

 Brushless alternators with separate excitation and AVR (Automatic Voltage Regulation) provide excellent motor starting and an enhanced ability to run non-linear loads.  
 Simple, one switch start for easy operation and easy voltage selection using a lockable voltage selection switch.  
 Rated power up to 120F (49C) for optimum performance even in hot climates. For cold climates, add many of the factory installed options like the cold weather package or battery chargers, etc.  
 Easy to use keypad for service diagnostics; engine diagnostic codes display on the LCD readout simplifying engine troubleshooting, fuel consumption, percentage load, kW per hour and other data available.  


 Model Variations
 G 120 (T4i) - G 120 generator, skid base Tier 4i engine  
 G 120 (T4i) Cold Weather - G 120 generator, skid base, cold weather, Tier 4i engine  
 G 120 (T4i) Custom - G 120 generator, ski base, custom, Tier 4i engine  
 Heavy-duty, dual axle trailers with aluminum diamond plate fenders are road ready with DOT lighting, chains height adjustable coupler and choice of surge or electric brakes.  

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*Price, if shown, is Manufacturer's Suggested Retail Price (MSRP) and does not include government fees, taxes, dealer freight/preparation, dealer document preparation charges or any finance charges (if applicable). MSRP and/or final actual sales price will vary depending on options or accessories selected.