Product Code: EF2200iS

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Genuine Factory New Yamaha Generators


Designed for emergency home backup portable power use, RV and camping power needs, and as a power source on many DIY home projects, the EF2200iS is the first in Yamaha’s upcoming lineup of generators exclusively equipped with CO Sensor technology to meet the Portable Generator Manufacturers’ Association’s™ (PGMA®) ANSI/PGMA G300-2018 standard to monitor carbon monoxide emissions. When the CO Sensor detects elevated levels of carbon monoxide, the EF2200iS automatically shuts off and will remain off for approximately five minutes, with indication that the generator needs to be moved to a well-ventilated space. A new CO Sensor graphic and LED indicator lights on the control panel notify the user of carbon monoxide emission levels or system malfunctions.

Top Features

CO Sensor for Safety
Shuts off at high level CO detection
High Output Engine
Powerful Yamaha MZ80 engine
Yamaha Quiet Technology
Super quiet engine operation
Twin Tech Parallel Function
Connect two EF2200iS together

Additional features

  • Powerful Yamaha 79cc Engine - Provides high power output.
  • Yamaha Quiet Technology - Outfitted with Yamaha sophisticated muffler for quiet operation.
  • Twin Tech Parallel Function - Connect two EF2200iS generators in- line with a Twin Tech cable for rated 30 AMPS of power.
  • Standard RV Outlet - No more searching for the right adapter.
  • Tri-Handle - Makes loading, unloading and moving the unit a breeze.
  • Smart Dial Knob - Simple and easy start-up.
  • Smart Throttle - Automatic load sensing adjusts power to device needs.
  • Illuminated Multi-Function LED Display - See generator status at a glance both day and night.
  • DC Outlet - Flexibility to charge and use devices.
  • Overload Reset Button - Easily restore power without shutting down the unit.
  • Yamaha Easy Carb Drain - Prevents stale fuel issues and prepares for long term storage.
  • Tool-less Rear Panel - Easily access engine compartment and perform maintenance.
  • Fuel Gauge - Easily see fuel level at-a-glance.


  • Type: Inverter
  • Maximum AC Output: 2200 Watts
  • Rated AC Output: 1800 Watts
  • Rated / Maximum AC Current: 15 / 18.3 amps @ 120V
  • Engine: OHV, air-cooled, single cylinder, 4-stroke
  • Displacement: 79cc
  • L x W x H: 21.9 x 11.8 x 18.5 in
  • Dry Weight: 55.2 lbs
  • DC Output: 3 amps @ 12V
  • Fuel Tank Capacity: 1.24 gal
  • Continuous Operation at 1/4 Rated Load: 10.5 hrs
  • Noise Level (1/4 Load - Rated Load): 57-65 dBA
  • Warranty: 3 Years Limited Warranty
  • Color: Blue

Customer Reviews

Based on 114 reviews
Scott L.

Very happy with this purchase. It shipped fast, arrived in great shape and fired right up!

Dennis M.
Very hard to get started

I removed it from the box put the exact amount of oil in it ethanol free fuel and tried starting it it took about 40 pulls to get it to fire
I have been letting it run for an hour or two at a time hoping it will get better at starting it does seem to be getting a little better at starting

Steven D.L.
Yamaha EF2200iS Inverter Generator

This is the second Yamaha inverter/generator I have purchased through National Supply and thier shipping speed is top notch. The EF2200iS has some really great features and is nice and portable. Perfect for my needs. Thank you National Supply.

paul d.



thanks for your attention

Good price and service.. EXCEPT

No problems or issues with Natl Supply but FED Ex was supposed to deliver with "signature required" - as is clearly noted on the Natl Supply site.
They dropped the unit off on my front porch and didn't get a signature even though we were home - WAITING for the shipment after 3 reschedules. So, we stayed home for 3 different days when they said they were going to deliver, more than a bit of an inconvenience. Your experience in your town with Fed Ex may be different but I'd love to get 3 days back.

Brian C.
Great generator

Received generator quickly. Shipment only took a couple of days. Love the 30 amp receptacle so I can plug my trailer in and it easily handles the AC unit load. No issues. Definitely going to come in handy boondocking in the woods. Fairly quiet.

Robert L.

I love the Yamaha generator!!! The customer service is unbeatable very knowledgeable about everything they sale !! I will buy no where else!!!! Thank you!!!

Verified C.

Converted to tri-fuel. Works great.

Roger R.

Excellent generator! This is exactly what I wanted. It took less than 4 days for the generator to arrive. Unpacked the unit, added oil and fuel and it started right up. I recommend this generator.

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