Yamaha EF2000iS Review

Yamaha EF2000iS Review: Is This The Best Portable Inverter Generator?

The Yamaha EF2000iS is a unique generator for those who need on-the-go energy or those who like to prepare themselves for an urgent situation or catastrophe. The Yamaha EF2000iS allows the fridge, hiking refrigerator, power tools, or television to be worked.

What you need, its make is very as generator that makes your existence so much simple where ever you are. The latest model number is EF2000iS2, and the Yamaha EF2000iS has changed.

It’s the same generator and certain changes in internal circuitry. All the material is still applicable in the report. Let’s know more about the Yamaha EF2000iS review.

Yamaha EF2000iS Review for 2024

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The EF2000iS cannot use solely for fun and warmth. You will still power critical instruments and equipment, such as your home power failure, in a more severe scenario.

The EF2000iS has unknown and is not daunting and noisy. It may, however, regardless of the specifications, be used together with several cases.


The EF2000iS takes a simple capacity 79 cc 4-hour OHV engine. It also comes complete with an iron cast cylinder that improves performance and engine life, preferable to other tiny inverter motors, and has superior heat escape. In particular, this model develops 2000 watts of peak and 1600 running watts.

And since this generator is a boost converter and comes complete with the Pulse Width Modulation (PWM) from Yamaha, this generates a rather ‘clean’ (that means pure sine wave that is suitable for running from a small air conditioner to the most advanced and responsive electronic devices such as computers and laptops.

The EF2000iS is not the strongest emergency power supply with 1,600 running watts. But this model might function if you only need to control a few major appliances, such as a full-size fridge with a tiny air conditioning device – or a bottle pump, lighting, and a couple of more small appliances.

If 1600 operating watts aren’t enough, the Yamaha EF2000 is parallel compatible, meaning you can double the output with two EF2000iS versions.

Power & Efficiency

As specified, CARB complies with this Yamaha made inverter line. It also follows both the California Air Management Board’s rigorous low-emission requirements and the Environmental Conservation Agency.

The Yamaha website reports that such generators have the longest pollution longevity thresholds given by the California Air Resources Board and the Environmental Protection Department. The engine has equipped with a CDI (Capacitor Download ignition or thyristor ignition) used for most small motors and produced a fast current for high motor speed applications on the spark plugs.

The BPR6HS plug form has suggested for substitution (NGK) With the OHV (overhead valve) configuration of the 4-stroke motor has 79cc displacement. The Smart Throttle has load-based and triggered by the Economy Control Switch.

Its OHV engine is powerful and effective in dissipating heat, guaranteeing both long-term and maximum fuel use. A steel camshaft and valve train components have used in this engine. It has an iron cast cylinder lining that offers strong heat dissipation and long life.

The 1.1 gallons (4.2L) fuel tank incorporates a fuel gauge to assess the remaining power. In a minimal fuel tank, the fuel volume, where the fuel gauge is, may difficult to “eye-ball.” Some reviews have claimed that their fuel gauge is useless in this prevalent model and a few grievances.

You will overfill when the gauge does not mean “absolute.” The petrol cap has an in/out air vent to allow the carburetor to pump. This will see when it has paired with the fuel cock button in the control panel when the fuel has burnt for storing or clearing.


The EF2000iS is a retro-modern, lightweight, lightweight product. It weighs only 44 lightweight pounds, which renders carrying without wheels convenient for most citizens. It is tiny and simple to pack and to carry (2.2 cu. ft).

Your ergonomically built handle is convenient, and when you take it to your destination would not leave tension marks on your palm and fingers. Also, it has recommended that you protect it well while carrying it in the rear of a pickup truck.

It could quickly tip over with a little footprint and a little bit. It can smoke heavily before the oil has burned down when it tips over. The side panels are quickly removable to eliminate dust and debris and allow the essential components easy to use.

No wonder, Yamaha EF2000iS is a favorite of campsites and light utility consumers (and inverter generators overall).

Noise Level and Start-Up

It’s one of the quietest generators on the market because of its super quiet passive silencer. The technology utilizes noise suppression to achieve the quietest possible activity. The generator has a sound-blocking design, and the glass wool structure is noise-absorbing.

And during intensive activities, this helps dampen the noise. At 1/4 loads, 51,5 dBA has measured at 7 meters and is very silent. The spectrum is only 61 dBA. It’s so silent that you can talk with one of them and don’t know it’s going to work.

It only generates 400 watts at a 1/4 load but considers a typical compact generator with a peak output of 2000 watts. His decibels are at this load in the mid 60’s so they don’t power down. Also, with low load, the engine revs at a minimum.

The Decibel rate is exponential. Remember. This means that the rise in 10 decibels between 50 and 60 means TWICE is as noisy. Along with the steady silence and vibration-insulating feet of this device, noise has held to a minimum.

The muffler provides a spark arrester authorized by USFS. A good option is for the comfort of the animals when camping.


  • Super quiet
  • Fuel efficient
  • Legendary reliability
  • Lightweight & compact
  • Good runtime
  • CARB-approved


  • Just a single 15amp outlet
  • Inadequate power output


We’re at the end of the Yamaha EF2000iS review. Indeed, the Yamaha EF2000iS is what it is crushed to be, I can confirm. It comes with a meager defect rate. The gold norm is a strong comparison.

You’re going to be pleased with the capabilities of this generator. It fits best in the midst of limited needs. Recall that the linking cord can be upgraded by hooking up a second device (separate purchase).

When you hook two of these, you would be able to supply much of your homes’ electricity requirements while a power failure is taking place in an emergency and to power many computers.

And of necessity, they may be individually disconnected and utilized. There are 200 reviews, most of which offer a 5-Star rating of this model.

Frequently Asked Questions (FAQs):

We’re here with some frequently asked questions. So, let’s check whether there is anyone that you’re looking for the answers to:

What Can A Yamaha EF2000iS Run?

The generator Yamaha 2000 is as compact as it comes, as already suggested. From the beginning, then it is obvious who this unit wanted to tailor – campers, tailgaters, hunters, RV afionacios, and virtually any human outdoors.
With the EF2000iS, you will take home the ease of your trip without noise or clunky feeling. The EF2000iS utilizes inverter technology to charge fragile iPads, tablets, smartphones, and other critical items.
Think about a wonderful journey in the forest, but you have taken your mobile phone, and some other gadgets to you as necessary; the EF2000iS can recharge your batteries, but they will be protected from damage.

How Many Hours Will A Yamaha EF2000iS Last?

A compact 4.4-liter, regularly unleaded fuel tank has included for the Yamaha EF2000iS inversion generator. Given this tiny tank, though, the EF2000iS is 10.5 hours longer if its load is less than 25%.
This is a perfect time to run with an inverter, confirming that this model is fuel-efficient compared to the area. As this model is an inverter, it has the Yamaha’s intelligent throttle, which allows the generator to idle when it has triggered.

How Many Amps Does A Yamaha 2000 Watt Generator Produce?

If you’d like more power, the EF2000iS has protected – it allows connecting two generators with up to 30 full amps using a handy parallel operation.

Read More: What Size Generator For 100 Amp Service?

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