Buy Used and Save: Buy a Used "Yamaha EF2000iSv2, 1600 Running Watts/2000 Startin..." and save 24% off the $1,273.75 list price. Buy with confidence as the condition of this item and its timely delivery are guaranteed under the "Amazon A-to-z Guarantee". See all Used offers.
Other Sellers on Amazon
+ Free Shipping
+ Free Shipping
+ Free Shipping
4-Year Lawn & Garden Extended Protection Planfrom SquareTrade
- Coverage for product breakdowns and malfunctions after manufacturer's warranty expires
- 24/7 customer support
- Free shipping on all repairs with no deductibles or hidden fees
- Fully transferable with gifts. Cancel anytime, full refund in the first 30 days
- If you purchase this service plan and eligible product for this service plan, you acknowledge that Amazon may send the service plan seller relevant product and price information for the purpose of administering the plan
Yamaha EF2000iSv2, 1600 Running Watts/2000 Starting Watts, Gas Powered Portable Inverter
- Enter your model number to make sure this fits.
- 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
Frequently bought together
Customers who bought this item also bought
Customers who viewed this item also viewed
Special offers and product promotions
Have a question?
Find answers in product info, Q&As, reviews
Please make sure that you are posting in the form of a question.
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|
Compare with similar items
WEN 56200i Super Quiet 2000-Watt Portable Inverter Generator, CARB Compliant
Westinghouse WH2200iXLT Super Quiet Portable Inverter Generator - 1800 Rated Watts and 2200 Peak Watts - Gas Powered - CARB Compliant
Champion 2000-Watt Stackable Portable Inverter Generator
Westinghouse iGen2200 Super Quiet Portable Inverter Generator - 1800 Rated Watts and 2200 Peak Watts - Gas Powered - CARB Compliant
Smarter Tools STAP-2000iQ, 1600 Running Watts/2000 Starting Watts, Gas Powered Portable Inverter
|Shipping||FREE Shipping||FREE Shipping||FREE Shipping||FREE Shipping||FREE Shipping||FREE Shipping|
|Item Dimensions||11 x 19.3 x 17.9 in||11 x 18 x 18 in||12.5 x 20.3 x 17.8 in||16.5 x 18.9 x 22.4 in||11.22 x 19.69 x 17.91 in||11.25 x 19.75 x 18.25 in|
|Wattage||1,600 watts||1,600 watts||1,800 watts||1,700 watts||2,000 watts||1,600 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.
Top customer reviews
There was a problem filtering reviews right now. Please try again later.
The most impressive thing about this unit is how quiet it is. Even at full engine speed you can stand about 6 feet away and have a normal conversation without raising your voice, or talk on a cell phone without undue distraction. It features an "eco" setting which tapers down the engine throttle and noise when full load isn't required. At half-throttle or less, from about 6 feet away it is about half as loud and amazingly quiet. I used it to run a 50-amp 12v battery charger and at full charge level the charger only required the generator to operate at about half-speed, and when the charger tapered down the charge level to under 30-amps the generator became so quiet I literally forgot about it. It is MUCH quieter than my boat's inboard diesel engine, and more efficient than running the main engine just to top off the batteries. I also used it to power a heavy duty 120v grinder and it had no problems supplying the needed power, even on electric motor start-up.
I got this mainly for charging our boat's batteries at anchor but I also wanted the ability to run power tools. The lighter 1000-watt inverter generators could easily handle the charging application but not the more power-hungry tools. Having the extra power also means the eco-throttle will likely kick in earlier and the unit will operate quieter. The number-1 purchase criteria was "quiet" because I don't want to be distracted by incessant noise or be a bad neighbor in anchorages. The Honeywell was not quiet enough in my opinion.
If generators are abused it will lead to regulations banning them, so an appeal to other boaters and to campers: Please don't settle for "cheap". Get a better quality inverter-generator unit that's quieter so you minimize noise pollution in get-away places. (Leave your "contractors generator" at home!!!) Also, please be considerate of neighbors and limit running it to times/places you aren't as likely to disturb others... and don't leave your boat or campsite while it runs and runs. We all like our electric conveniences, but if you really need 120v power more or less constantly you should either stay home or get a dock/parking space where you can plug into "the grid". It's rude to disturb others who are trying to get away to find some peace and quiet.
Negative: The unit ships without engine oil, so you need to buy a quart of standard 4-stroke engine oil and fill it. You will also need a funnel, and a pan to catch excess oil. There is no dipstick; you need to fill to the level of the bottom of the filler hole until any more runs out. It uses less than 3/4 quart. I think they should have included the required amount of oil, and a plastic filler container with a spout, marked to show the proper amount of oil to use.
Update 7/21/2015: Still running well. I switched to TruFuel and it starts first or second pull even after it's been sitting for months. The generator doesn't use much so the cost is worth it for reliability. Just say "No" to ethanol (and fuel related problems).
Update 10/11/2014: I had my first problem with this unit. It stopped running while in use, after about 30 minutes under medium load. I assumed the problem was bad gas or phase separation, and went through changing the gas and cleaning the fuel system, changed the spark plug (had never changed it in 5 years since new) and checked the oil level. Finally took it into a repair shop and they diagnosed a faulty spark coil. I'm not surprised that an electrical issue developed as this unit is used every summer on a boat in a hostile humid saltwater environment, and actually sat in a few inches of saltwater once. However the spark control circuit (spark coil) is a sealed unit potted in epoxy. I would expect any failure to occur at components or connections that are exposed to air. Perhaps the problem was really at the spark coil connection wire and not within the sealed module itself? Will never know, I paid the bill and it's purring like a kitten again.
Also, a note about tri-fuel conversion: Even though I have had no fuel problem with this unit, I've had fuel issues with outboard and snowthrower engines. I'm still drawn to the idea of doing a tri-fuel conversion for engines that aren't used frequently... But they charge around $200 for the kit plus I'd need to spend around $175 on top of that for a fiberglass tank/hose/quick-connect. A tri-fuel conversion also adds expense and bulky extensions to a unit that is otherwise very sleek, compact and portable. I've decided to use Tru-Fuel instead, on my small engines. It's expensive compared with gas from the pump plus fuel stabilizer, but you can buy a lot of it for the cost of a propane conversion kit, and it might help avoid aggravating downtime and costly repairs. When you need a generator -- you need it to run! Tri-fuel conversion still makes more else if you need extended run-time and portability is secondary.
Update 2/3/2014: I was researching the idea of adding tri-fuel conversion and came across this video on YouTube. Here is the link to the video[...]. I learned in that video (at 1:53 into the video) that the Honda 2000 controls don't allow a user to run the carb dry before shutting down the motor (but the Yamaha does). I think that's a huge PLUS in favor of the Yamaha. I always run the carb dry in my small engines when I might be leaving them sit for more than a few days, to avoid gum formation in the carb. For extended storage I also use the drain screw at the bottom of the float bowl.
Update 2/22/2012: In general still very happy with the unit, but checking oil level is inconvenient (you need to open the case with several screws) and changing the oil is a messy operation involving rags and clean-up because there is no neat way to capture the waste oil or overflow directly into a container. I think the next generation of this product should improve on that design issue and provide a dip stick or oil level indicator that's either externally accessible or located behind a quick-access panel. (Edit 8/21/15 Bill Esposito wrote down below in the comments that he "purchased a pair of these on 8/14/15 and they now come with a door for oil access....no more screws." Nice! Decided to copy that here in the main body of this review so it's more visible to readers.)
Having owned this for almost 2 years now I would add the following:
1) I have found that it has enough power to run the charger AND the hot water heater's 120v heating element at the same time. It is near-max (running full speed) but doesn't light the overload light when doing that and the charger is in bulk phase. Nice when you're in an anchorage for a few days and haven't run the engine. Why run a 57hp diesel just to heat water and charge the house bank?
2) If I shut off the fuel and let the carburetor run dry before putting it away, it does not smell of gas with the fuel vent and fuel valve both closed. The maker advocates storing in a well ventilated area or garage, but odor from fumes is not a problem.
3) It's also useful at home during power outages. I have a larger much louder 5500w contractors generator that plugs into a 12-circuit transfer switch wired by an electrician, but as a courtesy to neighbors I shut that off overnight. I can use this Yamaha unit with an extension cord to keep just the refrigerator running overnight and it stays in 'eco mode' so it practically purrs. Also the fuel burn rate is extremely low so it uses a fraction of what the larger generator would use.
Recommended Accessories: Recommend a heavy-duty generator style electrical cord so you don't lose power if it's far away, two funnels (one for oil, one for gas), and of course a power strip. Remember, most generators will fry if they get wet. Don't overfill or gasoline will get in the filter.
The only reason I gave it 4 stars instead of 5 is because the fuel gauge is not accurate -it shows that it's empty when it's not, and then quickly goes up to "F" for full, so you have to be careful not to overfill it. We changed the oil after running it the first time for 2 days and it was pretty dirty, so I'd recommend doing that. Manual was not very helpful in terms of understanding what kind of load it could carry.
UPDATE: The second time we used it (after running it about 60 hours in the first power outage) fuel poured out of it. $137 of service later, they told us the needle valve was stuck and the carburator needed cleaning. We had used regular gasoline, followed all instructions, and emptied it of fuel and oil after first use. After cleaning, it shut itself off every 10-40 minutes. VERY DISAPPOINTED! We thought we had power outages solved.
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.
Most recent customer reviews
- starts on first pull as advertised
- it's easy to carry, which is a big plus
Getting the cover off to fill with oil is a bit...Read more