Yamaha EF2000iSv2, CARB Compliant, Gas Powered Portable Inverter Generator

The Yamaha EF2000iSv2 is a super-quiet, CARB compliant gas powered portable inverter. Lightweight and upgraded, this model is designed to be retro-cool, yet it’s functional and has advanced programming to offer wider application ranges. It also boasts more power than the original Yamaha EF2000iS.

And at under 45 pounds and 2.2 cu ft., this is the generator that can be used around the farm, garage or when camping.

We’re going to provide our own in-depth Yamaha 2000 watt generator review, but first, we want you to see all its impressive features and specs.

Yamaha 2000 Watt Generator Features and Specs

  • 1600 Watts / 2000 Maximum AC output watts
  • 120V, 13.3 / 16.7 amp rated / maximum current
  • 44.1-pound weight
  • 1.1-gallon fuel tank capacity
  • 10.5 hour, 1/4 rated load
  • 51.5 – 61 dBA
  • 50 state clean emission
  • 3-year warranty

Yamaha 2000 Watt Generator Review

The Yamaha EF2000iSv2 ships with a 51 weight, but the unit itself is 44.1 pounds. A compact design with dimensions of 19.3” x 11.0” x 17.9” allows the unit to be transported with ease. Its retro look provides an aesthetically-pleasing generator that can be used anywhere from on a farm and garage to an emergency.

Yamaha focused on style, and it really shows with this model.

But what users are most concerned about is usage.

Setup and Getting Ready for First Usage

The packaging is simple and easy, and you’ll need 1.1 gallons of fuel to get started. It’s simple to use. Simply add fuel in the inverter by filling the unit with gas. Pull the cord, and you’re ready to begin powering all your devices.

It’s that easy to get started.

Smart Throttle and Runtime

A smart throttle monitors the unit’s speed based on the load to improve fuel efficiency. As an inverter, this generator produces cleaner energy and can run for up to 10.5 hours on a 1/4 rated load for long-lasting power.

The fuel gauge on the front of the unit alerts you of fuel usage, and stale gas problems are handled with the gasoline petcock.

Gasoline petcocks allow users to shut off the gas to run the carburetor dry and eliminate stale gas. And this model is CARB compliant, so it’s able to be used in all 50 states due to its clean emission production.

The auto-decompression system allows a quick and easy startup while the auto warm-up feature allows for higher speeds during a cold start to power appliances quickly.

If the unit is run at full load, it will run for 3 – 3.5 hours at most before a refill is needed.

Power When You Need it Most

Voltage stability is provided through the unit’s Pulse Width Modulation (PWM), which allows voltage to remain between +/-1%. The unit’s frequency stability is between a small +/- 0.1 HZ.

The PMW allows for high quality power that’s clean.

Yamaha incorporated a new controller which allows for advanced output, so users can operate between 1600W and 2000W maximum operation ranges. This allows you to be able to power everything from a coffee machine to lights and even a blow dryer, which all women know tends to trip the power on occasion.

If you need to add even more power, you can use the unit’s Twin Tech Parallel function that allows you to hook two of the units into each other to deliver up to 30 amps of power. You can attach the Yamaha EF2000iSv2 and EF2000iS together, but the Twin Tech Cable is not included.

Centralized control allows for AC/DC out.

There are:

  • 2 – 120V AC outlets
  • 1 – DC Outlet

The 8A 12V outlet allows users to charge batteries, too.

The power behind this generator is the OHV Engine. An OHV engine is efficient and reliable, and the heat dissipation engine allows for a longer engine lifespan. There’s also a cast iron cylinder liner, steel valve train components and camshaft.

At 79cc, this engine is 4-stroke, single cylinder and air-cooled.

Low Noise Production

Gas generators are loud. Even the quietest units still produce a notable sound. Yamaha included a super-quiet muffler that produces just 51.5 dBA at 1/4 load. When load levels are at their peak, the unit will produce a maximum of 61 dBA.

Usage and Safety Concerns

This unit is not water resistant, and you don’t want to run it inside of your home either. Gas will produce harmful gases that can kill you if you run the unit indoors. People die each year from running a generator in their home.

If rain is in the forecast, it’s best to put the unit away.

Generators should be used when the weather is clear for the utmost safety.


  • Lightweight and easy to carry with the oversized handle
  • Extremely quiet – you can have a conversation 6 feet away
  • Offers 30 amps of power when using Twin Tech Parallel
  • Powers everything from lights to saws to drills and blenders


  • Difficult to start when temperatures are 40 degrees or less

The one thing that I need to mention is that it’s difficult to start the EF2000iSv2 when it’s 40 degrees or less outside. You’ll need to give it quite a few pulls before it starts, but this has a lot to do with the gas. If the gas has sediment in it, you’ll have a difficult time starting the unit.

But if the gas is higher quality, the unit starts quickly.

If you’re on the market for a Yamaha portable generator and want one of the quietest, reliable models, this is it.

Click here to learn more about the Yamaha EF2000iSv2.

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