Yamaha EF12000DE 12000 Watt 22 HP Generator

 Product Identifiers Model    EF12000DE  Key Features Horsepower    22 HP AC Max Output    12000 Watt

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Maximum AC Output

12,000 watts

Rated AC Output

9500 watts

Rated / Maximum AC Current

79.2 / 100.0 amps @ 120V - 39.6 / 50.0 amps @ 240V


OHV, Forced Air-Cooled, Four-Stroke, Twin Cylinder



Overall Length

33.3 in

Overall Width

29.6 in

Overall Height

33.3 in

Dry Weight

327.8 lb

Fuel Tank Capacity

11.4 gal

Continuous Operation at Rated Load

8.0 hr

Noise Level

80.0 dBA

3 yr Warranty

  • Dual voltage - Provides the versatility of 120 and 240 volt operation.
  • OHV engine (overhead valve) - Precise valve actuation and heavy-duty design offer improved efficiency, increased reliability and quite operation.
  • Cast iron cylinder lining - Provides optimal heat dissapation, consistent performance during continuous use and long engine life.
  • Oil Watch Warning System - Automatically shuts off before oil level is low and cannot be re-started until oil is added. Prevents engine damage and costly repairs while enhancing long-term durability.
  • Auto Voltage Regulation - Guarantees correct power delivery even with extension cords, enhances performance, adds convenience.
  • Transistor Controlled Ignition (T.C.I.) - Provides clean, efficient spark that ensures fast, easy starting. Low maintenace, reliable operation.
  • Noise Suppressor - Reduces electrical interference with TVs and radios.
  • Auto Decompression - Automatically "opens" exhaust valve slightly to reduce initial backpressure when starting making manual starting effortless.
  • USFS-approved Spark Arrestor - Offers quiet operation and keeps sparks from exiting exhaust system, reducing chance of fires caused by an errant spark.
  • Ground Fault Interrupter (G.F.I.) - If the system senses a leak to "ground," it automatically cuts off power to help prevent injuries.
  • Fuel Gauge - Lets operator monitor how much fuel is left.
  • Electric starter - For convenient ease of operation.
  • Economy idle - When there is no load on the generator, it automatically returns to idle for improved fuel efficiency and quieter operation.
  • AC Non-fuse Thermal Breaker - Protects AC circuit in case of an overload for added durability and peace of mind.
  • Tool Kit - Makes service easier.


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