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Yamaha EF2000iSv2, 1600 Running Watts/2000 Starting Watts, Gas Powered Portable Inverter
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- 1600 watt rated AC output, 2000 watt maximum AC output, 13.3/16.7 amps @ 120V
- Super-quiet muffler with USFS-approved spark arrestor - 51.5 dBA at 1/4 load
- Smart Throttle varies engine speed based on load - improves fuel economy and reduces noise
- Inverter system with Pulse Width Modulation (PWM) control
- CARB Compliant
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From the manufacturer
Upgraded, Power-Packed, Quiet and Lightweight
Yamaha's EF2000iSv2 inverter generator quietly powers a wider range of applications for an extended time, while still portable and retro-cool. The completely new controller with advanced programming gives the EF2000iSv2 the ability to power a much wider range of applications than previous generation EF2000iS. At less than 45 pounds, it is lightweight, very compact (2.2 cu.ft.) which makes it easy to store and transport.
Clean, high quality power
The Yamaha EF2000iSv2 Inverter generator supplies clean, high quality power. The EF2000iSV2 – with its inverter system – features Pulse Width Modulation (PWM) so voltage stability is within ± 1%, and frequency stability is ± 0.1 HZ. Its pure sine wave is as clean as or cleaner than public utilities power.
New controller powers more tasks
The EF2000iSv2 incorporates a completely new controller with advanced programming resulting in improved output characteristics between 1600w-2000w operation ranges. The addition of the new programming allows the EF2000iSv2 the ability to power a much wider range of applications than previous generation EF2000iS.
Long Run Time
The EF2000iSv2 features Smart Throttle, a load sensing rpm control that allows greater fuel efficiency and noise reduction by automatically adjusting engine speed to match the load. It will run up to 10.5 hours at ¼ rated load on a tank of gas.
Twin Tech Parallel Generator Operation
If you need extra power the EF2000iSv2 has you covered—a convenient parallel function lets you connect two generators to deliver up to 30 amps. The EF2000iSv2 may be connected in parallel with an earlier model Yamaha EF2000iS.
Note: Requires Twin Tech Cable and 2nd generator, not included.
The EF2000iSv2 is fitted with Yamaha’s most technologically sophisticated muffler with USFS-approved spark arrestor. It’s so quiet that you can have a conversation near one and may not realize it is running. (51.5 dBA to 61 dBA – ¼ rated to rated load). Rubber vibration isolation feet smooth operation and reduce noise.
An Ounce of Prevention...
Oil Watch Warning system — Prevents engine damage caused by low oil, avoiding costly repairs and minimizing down time, adding customer confidence and peace of mind. Electrical overload breaker — Prevents generator damage in case of overload.
Smart Throttle varies engine speed based on load — Improves fuel economy and reduces noise. Runs up to 10.5 hours at ¼ rated load on a tank of gas.
Fuel Gauge & Gasoline petcock
See fuel gauge at-a-glance. Gasoline petcock lets you shut off the gas to run the carb dry for storage and helps prevent stale gas problems.
Efficient, reliable, powerful providing long life and excellent heat dissipation - OHV engine includes steel camshaft and valve train components, cast iron cylinder liner.
50 State, Clean Emissions
EPA & CARB Emission Engine Durability Rating — Yamaha generators have the longest emission engine durability ratings issued by the Environmental Protection Agency and the California Air Resources Board.
Auto-decompression system — Reduces compression for easier starting. Auto warm-up – Increases engine speed during cold starts to handle high power demand appliances right away.
Centralized Control, AC/DC out
Easy access to controls and fuel gauge allows fuel level to be seen at-a-glance. Includes two 120V AC outlets and one DC Outlet — 8A 12V outlet for charging batteries (cables included).
|Rated / Maximum AC Output||1600 watts / 2000 watts|
|Rated / Maximum AC Current||13.3 / 16.7 amps @ 120V|
|Engine||79cc OHV, air-cooled, single cylinder, 4-stroke|
|Weight / Dimensions: Length x Width x Height||44.1 pounds / 19.3 x 11.0 x 17.9 inches|
|Fuel Tank Capacity||1.1 gallons|
|Continuous Operation at 1/4 Rated Load||10.5 hours|
|Noise Level||51.5 - 61 dBA|
|Limited Warranty||3 years|
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|Sold By||Amazon.com||Amazon.com||Amazon.com||Hardware Sales Inc.||MidState Performance Parts||PPL Motor Homes|
|Item Dimensions||19.3 x 11 x 17.9 in||18 x 11 x 18 in||20.5 x 17.9 x 17.7 in||22.3 x 13.25 x 19.8 in||1 x 1 x 1 in||—|
|Wattage||1,600 watts||1,600 watts||3,500||2,800 watts||2,800 watts||2,800 watts|
Powerful, portable, and efficient, the Yamaha EF2000iS Gas-Powered Portable Inverter delivers maximum electrical output without sacrificing portability. Thanks to its innovative inverter system, the generator is able to generate up to 2,000 watts of clean AC power. It can run up to 10.5 hours continuously without refueling and uses premium technologies to maximize fuel efficiency.
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- Brand name: yes like Honda, it's a brand name, so is the third party 500$ gens, but this brandname is held to a high standard with Yamaha motor sports engines. Which relates to customer service. Try getting warranty repairs on the 500 generator you bought.
- Fuel Gauge: really Honda? 1k and you can't put a fuel gauge on the thing, the Yamaha has a simple gauge to tell fuel levels, EXTREMELY useful.
- Turning the fuel line on and off, big for me, you can turn off the fuel line and let the carb run try without having to worry about clogging up injectors.. You can have fuel in it and have it ready to go on a moments notice, the Honda, you have to worry about the clogging and whatnot, to burn the fuel off means you have to either empty the tank of gas (pain in the butt) or run it all dry. No thanks.
- Comes with the car AC cables, Honda doesn't...
The big contenders in this class are this unit and the Honda 2000 watt inverter generator. I selected the Yamaha after several features stood out:
1. Fuel shutoff allows the carb to be run dry, which helps prevent starting problems after extended storage.
2. Carb drain gets every drop of fuel out for even more extended storage. (such as over the winter.)
3. Gear driven valve train instead of belt driven.
4. Closable vent cap to prevent fuel spills and fuel level indicator in the cap.
Prices were competitive and main features similar, but the Yamaha just stood out as a fuller featured machine for about the same price. These small units won't fun larger A/C units on RV's, but work with my single small RV A/C unit, although it won't run the A/C and microwave at the same time. It's also been very helpful for tasks around the house. I have a large shed that is several hundred feet away from the house, and I added a simple electrical system for lights and outlets, with a 2-breaker electrical box and extension that plugs into the generator sitting outside the shed. With the generator running, the shed becomes a remote workshop.
As with most inverter type generator systems, this unit is very quiet, especially when placed in the economy mode. The big advantage to the inverter technology is that the engine can vary in speed according to load, reducing noise and fuel consumption at low power output. The Yamaha case does a good job dampening the sound output and the controls react quickly to a surge in demand. I haven't had any instances of the unit shutting down due to excessive demand.
This generator comes with all the accessories needed, including DC battery charger cable and spark plug wrench. It does not come with any oil, so a quick trip to the auto supply department for a quart of oil is needed.
The generator is light enough for my wife to move it around and the large comfortable handle gives a good grip. The controls are all grouped together with the pull starter although you do need to tip the unit back so you can see which button you're pressing. The economy mode and on/off switches are covered with a protective rubber membrane to prevent water incursion.
It has a manual choke. It's a bit fussy to get started because you need to make sure several switches are set in the right position, the gas cap vent is open and the gas shutoff is open, and the choke is set. I wish I could say it always starts with one pull, but since I run out the gas in the cab when I'm done using it, it takes several pulls to get the carb primed and the engine started, but it does start reliable even in colder temperatures.
Overall, I'm very pleased with my purchase and I can recommend it to anyone who need lightweight, portable A/C power source.
Now, if you plan to use this thing only a few hours here and there when the lights go out, or for tailgate parties, this probably won't be as big a deal for you, since you'll probably only put a few hundred hours on it in a decade - but if you plan to use it a lot, read on.
I've purchased and put three of these things through the paces, one every couple seasons.
After you put a few thousand hours on these things, they start eating oil like candy.
I'm talking 8-12 hours from full crankcase to low oil shutdown - like fill the oil every time you fill the gas.
A search online shows I'm not the first to run into this, either.
I'm not sure what the design flaw is, but the other yamahas, the 1000is and the 2400is, haven't got this issue.
Then again, those were made in Japan, these are now made in China.
All three of these EF2000iS generators used to run the whole oil change interval without any change in oil level, then abruptly that changed.
Your mileage may vary. Still, three out of three, as the hours piled up. I kind of got sucked into the deal, as we have other yamaha generators (2400 watt and 900 watt) and when the first 2000is began to eat oil, I figured it was an anomaly. By the time we bought the third, a pattern had emerged that this particular model has oil issues with increasing age.
As of this writing the first two are dead, and number three is going downhill fast, but won't be quite bad enough for Yamaha to service it before the warranty expires. Their service shops leave a lot to be desired, when you can find one, and the techs view 5 ounces of oil use per tank of gas as "normal"... None of these 3 machines made it past 3000 hours.
That's three of three of these things, dead of oil issues, despite good maintenance.
Yeah, we put a lot of hours on them. Same goes for the 2400 watt one, and the 900 watt one.
Here's the point: The 2400is and the 900is are still trucking along, though the sun has faded the plastic housings, and a few nonessential parts have fallen off them, and they were bought several YEARS before the first of these 2000is generators.
They're still doing fine - in fact, the 2400 is outside in a thunderstorm, running as I write this - it was bought many, many years ago and with a conservative 25,000-35,000 hours on it it still DOESN'T USE A DROP OF OIL. Not a typo, man. Tens of thousands of hours of run time. The 900 has been everywhere and done everything under all conditions and in all weather, for so long I can't even guess at the hours on that puppy and it DOESN'T USE A DROP OF OIL.
But then, that engine was made in Japan, not China.
My point is simply this:
I have two other models of yamahas that date to around 2003. They are faded from being from the sun, but you can't kill them, or their Japanese engines.
I have three of these EF2000iS's that date from 2010 to the present. They, and their Chinese engines, are now junk.
Let the buyer beware... and if you really need a generator in this class, I don't know where to send you, as honda is now outsourcing their engines to Thailand, apparently.
Update - we've added a Honda eu2000 to the mix and I've run it a good bit. Now, I believe I do know where to send you.
The Honda is a bit less fuel efficient, but a good deal more robust as far as starting heavy loads without huge voltage dips.
I hate the Honda fuel filler, it's too small in diameter, the choke is a plastic tab, and I'm not a fan of the on/off switch and fuel shutoff being the same knob, would prefer a Japanese motor, but zits amd all it scores over the Yamaha in a few key areas, at least so far. It's more powerful, significantly better in starting heavy loads even from the eco throttle setting, and locally serviced by people who actually can fix it. So far, it holds its oil just fine, too.