Product Code: EF5500DE

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$2,699.00$2,377.00Save 12%
3-Year Factory Warranty

On All Yamaha Generators

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Genuine Factory New Yamaha Generators

Yamaha EF5500DE 5500 Watt Generator with CO Sensor
Purchase the Portable Electric Yamaha EF5500DE 5500 Watt Consumer Generator for emergencies, tailgate parties, camping, and other outdoor activities at! The EF5500DE uses a 358cc OHV engine with recoil start that combines 5500 watts maximum AC output with outstanding fuel efficiency. Allows 9 hours of continuous operation on a single tank of fuel.

Top Features

CO Sensor for Safety
Shuts off at high level CO detection
8 Hours Runtime
13% longer runtime that previous mode
Electric Start
Makes starting effortless
Rugged Design
Roll cage protection for heavy jobs

Additional features

  • New and improved OHV MZ360 engine with a hemispherical head ‐ Yamaha legendary durability and reliability.
  • Rugged Wheel kit w/fold-down locking handles ‐ Standard on the EF5500DE.
  • The battery is standard on the EF5500DE - Wheel kit and Battery are a great value and offer added convenience for transport and starting
  • Cast iron cylinder lining ‐ Optimal heat dissipation.
  • Automatic oil warning system shuts off engine before oil level is low ‐ Prevents engine damage, avoids costly repairs, minimizes down time, enhances long term durability.
  • Transistorized ignition provides lean, efficient spark ‐ Maintenance-free and ensures fast, easy starting, reliable operation.
  • Auto decompression ‐ Automatically “opens” exhaust valve to reduce compression for easier starting.
  • EPA Emission Engine Life Rating ‐ The EF5500DE meets the strictest environmental standards - EPA and CARB.
  • 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.
  • Tool kit ‐ Makes service easier.


  • Model / Model Code: EF5500DE
  • Type: 3 Year Limited Warranty
  • Dimensions (length/width/height): 29.1" x 28.4" x 31.5"
  • Dry Weight: 221.7 lbs
  • Engine Type: OHV
  • Displacement: 358cc
  • Capacity: 6.9 Gallons
  • Fuel Type: Unleaded Regular
  • Cooling Type: Air Cooled
  • Type: Brushless
  • Maximum AC Output: 5500 Watts
  • Rated AC Output: 4500 Watts
  • Rated AC Current / Maximum: 36.0 amps /44.0 amps @120V | 18.75 amps/22.9 amps @ 240V
  • Noise Level: 74.1 dBA
  • Continuous Operation at Rated Load: 9.0 Hrs

Customer Reviews

Based on 10 reviews
Chris T.
Generator Purchase

National Supply was easy to deal with and make a purchase from. They also had the model generator in I was looking for where others were telling me they didnt know when or if they could get me one. Shipping was no hassle as well.

Generator purchase

Service was excellent. Employee was very knowledgable and helpful. Would definately use again. Shipping was very fast.

Allen C.
No issues

Great products I re-powered my boat to Yamaha outboard, love the quality. When I found the Yamaha generators I purchased one without hesitation. Doing business with National Supply was quick and easy.

Thank you guys!

Yamaha EF5500DE 5500 Watt Generator

Haven't used it yet. Looks great.
Better work great and be very quiet as a friend bought a 9000 watt "Champion" from Costco for a third of the price. I'm betting on you get what you pay for.

Good product

Does what y'all say it will do and I'm happy

Jordan E.
National Supply

I had a fantastic experience with National Supply. I had some specific shipping requirements noted within my order and received a call literally about 4 minutes after I submitted my order. Everything was delivered on-time and at great price. I have already recommended you to a friend who is in the market for a generator.

Michael K.


Yukon T.
Yamaha EF5500DE

Delivered in 6 work days. After 4 hours of assembly, servicing with oil and gasoline, it fired up on the first push of the starter button. So far it is everything I expected ... plus.

David G.
Yamaha 5500 Watt Generator

Ordering the generator was super easy, and it was delivered on time.
The generator runs very smoothly, and starts quickly.

James S.
Yamaha EF5500DE

Ordering from this company was quick, easy and entirely satisfactory. The generator arrived exactly when promised.
Yesterday three friends and I loaded it on my boat out to my remote island, installed it and fired it up. Flawless operation. Directions and items supplied were of the highest quality and I am well pleased. The generator supplies my electrical needs and charges my battery bank and inverter system (am completely off grid). Nothing but highest praise for both the Yamaha generator and "Yamaha". Fine company to do business with.

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