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Yamaha Portable Generator EF2000IS Review – The Best Portable Generator

The Yamaha EF2000iS portable generator combines an excellent power output rating, high versatility, ease of operation and reliability into one, affordable package. Yamaha’s well known quality and engineering mastery is evident in the EF2000iS. Perfect for campers, recreational vehicle users, all-terrain vehicle enthusiasts, home owners and light-duty job site uses, this Yamaha generator is a gem in the generator lineup. At a glance, these are the features of this small generator:

  • It puts out 2000 watts of peak power at 16.7 amps and 1600 watts at 13.3 amps of rated power
  • It has a Light weight design at only 44 lbs. in a small, easy to carry package (2.2 cubic feet)
  • It can run up to 10.5 hours of continuous operation per fuel tank (1.1 gallon fuel tank capacity)
  • The generator is extremely quiet
  • It has the ability to link together with a second EF2000iS for more power as needed

Portable Power

Since the Yamaha EF2000iS weighs only 44 lbs, is only 2.2 cubic feet in size and has a large carry handle, it’s one of the most convenient portable generators available today. Check out these Amazon reviews  to see why the Yamaha EF2000iS is routinely praised as one of the best in class. It’s easy to see why: the price point, reliability and portability make it an excellent choice. It fits into nearly any car trunk without a problem. It can be easily carried by most people and features a large, ergonomically comfortable carrying handle. The generator doesn’t weigh very much and is simple to operate.

With up to 2000 watts of power output available, the Yamaha EF2000iS can handle a variety of tasks for a variety of users. For example, campers and outdoor enthusiasts will find that this little Yamaha generator can easily power common cooking items such as toasters, microwave ovens, electric skillets, small electric ranges and coffee makers with ease. No longer leave home without entertainment, either. The EF2000iS will easily power stereos, televisions, DVD players and VCR’s comfortably. There’s no need to give up on comfort while camping or enjoying the outdoors, either. The generator can keep enthusiasts comfortable and cozy by powering small heaters and electric blankets.

The Yamaha EF2000iS can even handle light job site duties. In remote areas where electricity isn’t available, or in a simple workshop that has no local power, rely on the generator to power tools like belt sanders, jig saws, electric chain saws and even small air compressors.

As an alternative to buying a larger, higher capacity generator, Yamaha has ingeniously designed the EF2000iS portable generator with the ability to link to another EF2000iS with an optional parallel linking cable to generate up to a maximum of 30 amps of power. This enables a more versatile portable power system that allows it to grow as power demands increase, all the while maintaining a simple, affordable, quiet generator system.

Yamaha also foresaw its customers’ needs by incorporating a 12 volt battery charging system into the EF2000iS portable generator. With the included charging cables, in addition to its conventional inverter power system which supplies 120 volts of AC power, the generator supplies 12 volts DC power to charge batteries. This feature makes the Yamaha EF2000iS an excellent candidate for anyone traveling well into unpopulated areas that wants the peace of mind of having a battery charger. It also makes this Yamaha generator an excellent tool to have at remote outdoor events, boathouses, automotive shops and church gatherings. There’s no need to be stranded with a dead battery when the Yamaha EF2000iS is standing by.


Ultra-quiet, Easy Operation

Not only do generators need to have the capabilities its users require, they also needs to be relatively painless to operate. Gone are the days of reading pages and pages of instructions and worrying about rigid maintenance rituals. Yamaha not only made the EF2000iS a highly capable, quiet generator, it made it with elegance, grace and simplicity.

Glance at the Yamaha EF2000iS and its brilliant, deep blue and black exterior with chrome highlights delights the senses with aesthetic beauty. The control panel, located beside its large and ergonomic pull-start handle, lays out the controls in an easy to understand, well organized manner. Simple indicator lights are mounted and plainly labeled upon the panel among its on/off switch, fuel petcock switch, and economy mode switch. The text labels are large and easy to read. Above the control panel rests the fuel filler cap, conveniently paired with a fuel gauge – not an option available on other generators in this class. While this detail may seem trivial, being presented with such fine touches makes owning and operating the EF2000iS easy and enjoyable.

The Yamaha EF2000iS ships without oil, which is plainly labeled in several places during unpacking. Add the recommended oil to the machine, pour in a gallon of gasoline, and the EF2000iS is ready to power on.
Starting the Yamaha EF2000iS is simple business. Like any gasoline engine powered equipment, the generator should be used outdoors in a well ventilated area at least a few feet away from walls or other large objects. Starting it is straightforward. Turn off the economy mode control switch, open up the gas cap vent, turn the fuel on, turn the main engine control switch on, pull the choke to the on position, and pull the recoil starter.

One thing that becomes apparent when the Yamaha EF2000iS is running is how quiet it is. While powering the morning’s breakfast kitchen, for example, there’s no fear of rudely waking up neighboring campers. It’s hardly apparent that the Yamaha EF2000iS portable generator is running at all while standing right next to it, sipping a cup of freshly brewed coffee and having a conversation. It’s that quiet. The neighbors, after having shared a cup of coffee brewed from the coffee maker that got its power from the Yamaha EF2000iS, might well rush to Amazon to find the best price.

When it’s time to put the EF2000iS portable generator away, Yamaha made the storage process simple. There’s no need to make a mess by trying to drain the carburetor manually. Simply turn the fuel petcock switch to the “OFF” position while the generator is running. This allows the generator to run the carburetor dry, preventing residual gasoline from contaminating the carburetor during storage. After doing this, top off the tank and add fuel stabilizer if the unit is going to be stored for a long period without use.


High Efficiency, Cleaner Power

The Yamaha EF2000iS portable generator combines two important features to create efficient, clean power. First is Yamaha’s smart throttle system, activated when the economy control switch is set to the “On” position. This mode varies engine speed based on power demands being placed on the generator circuits. When power demand rises, the internal combustion engine’s throttle increases. When power demands go down, the engine relaxes as the throttle drops to a lower setting. In this mode, the generator will run for up to 10.5 hours on about a gallon of gasoline. Turn the switch to the “Off” position and the generator’s engine will run at a steady 4500 revolutions per minute, providing maximum power for demanding applications.

The second feature, the Pulse Width Modulation control (PWM), is built directly into the generator’s inverter and operates automatically. This device allows the inverter to produce a pure sine wave. This makes possible the safe operation of sensitive equipment, such as computers or devices with a microprocessor control.


Easy Maintenance and High Reliability

Yamaha made the EF2000iS an excellent generator with a simple, easy to understand maintenance schedule. Outlined in the owner’s manual, maintenance to the machine is straightforward. The generator’s maintenance cover can be removed in seconds by just removing a few screws and gives the user access to the spark plug, engine oil and air filter . These items are the most common maintenance parts and are typically serviced every six months. Most maintenance can be done in a matter of minutes, leaving the owner more time to enjoy the EF2000iS and less time repairing it.

The engine, an overhead cam four stroke design, features a cast iron lined cylinder for high reliability and efficiency. The muffler, a technologically advanced part made to keep noise as low as possible, is also well built and can be serviced periodically by cleaning the internal muffler screen and spark arrestor.


Product Dimensions

The Yamaha EF2000iS is compact by nature. Adding to its elegance in simplicity is a large, ergonomic carry handle, making it easy to move around. The bright blue exterior pronounces a retro style and fun-loving attitude. Its dimensions are as follows:

  • Overall Length: 19.3 inches
  • Overall Width: 11.0 inches
  • Overall Height: 17.9 inches
  • Dry Weight: 44.1 lbs
  • Fuel Tank Capacity: 1.1 gallons


Pros and Cons

By any comparison, the Yamaha EF2000iS portable generator is a well-rounded unit. However, despite its many prominent features, there are a few drawbacks. First, the price is much higher than cheaper, louder off-brand units. On value alone, it may seem pricey. Amazon seems to have the best deals on these generators.

The second drawback is its limited power output. While most casual campers would be totally satisfied with the EF2000iS power rating, some may be wanting for more power. There are more powerful generators available, but adding more power does give up portability. Also, don’t forget that the Yamaha EF2000iS is able to run in parallel with another of the same model, making it versatile, portable while still meeting higher power demands.

Simple maintenance, the ability to run the carburetors dry for storage, ease of operation and high fuel efficiency make this generator a great choice for many users. For more routine high power requirements, however, some people will not find that the EF2000iS meets their demands.


What Others Say

The Yamaha EF2000iS is a well-loved generator according to the majority of users. Amazon’s user reviews overwhelmingly rate the generator five stars, the highest rating. Most reviewers users cite excellent fuel consumption and quiet operation as the main reasons for giving the EF2000iS such high marks. Professionals and daily users of the Yamaha generator routinely express their satisfaction with its high reliability and overall cost of ownership.


The Bottom Line

People who want a very quiet generator for camping, outdoor sports and light-duty job site power will find the Yamaha EF2000iS very attractive. It supplies plenty of power for most casual users, is very easy to use, doesn’t require tons of time for maintenance, and is priced competitively. With the ability to run for over ten hours on a single gallon of gas, economy-conscious users will find the generator’s excellent fuel efficiency delightful. Pairing these features with its small size and light weight, the portability makes this generator an excellent choice for many on-the-go applications.

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