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  • Yamaha EF1000iS 1,000 Watt 50cc OHV 4-Stroke Gas Powered Portable Inverter Generator (CARB Compliant)
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Yamaha EF1000iS 1,000 Watt 50cc OHV 4-Stroke Gas Powered Portable Inverter Generator (CARB Compliant)

by Yamaha
| 19 answered questions

List Price: $879.00
Price: $791.10 & FREE Shipping. Details
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  • 1,000 Watt Maximum AC Output/900 Watt Rated AC Output
  • Noise Block Acoustically designed sound reduction system
  • Long Run Time - Runs continuously for up to 12 hours without refueling
  • Smart Throttle Load sensing throttle control
  • CARB Compliant
  • This item cannot be returned
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Yamaha EF1000iS 1,000 Watt 50cc OHV 4-Stroke Gas Powered Portable Inverter Generator (CARB Compliant) + No-Spill 1405 2-1/2-Gallon Poly Gas Can (CARB Compliant) + No-Spill 1415 1-1/4-Gallon Poly Gas Can (CARB Compliant)
Price for all three: $834.13

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This item: Yamaha EF1000iS 1,000 Watt 50cc OHV 4-Stroke Gas Powered Portable Inverter Generator (CARB Compliant)
Customer Rating (52) (54) (39) (11)
Price $ 791.10 $ 1331.10 $ 335.25 $ 375.14
Shipping FREE Shipping FREE Shipping $ 25.20 $ 20.98
Sold By Amazon.com Amazon.com Drill Spot Great Household
Power Source gas-powered gasoline-powered gasoline-powered gas-powered
Wattage 1000 watts 2400 watts 800 watts 800 watts
Voltage 12 volts Information not Provided Information not Provided 12 volts
Dimensions 14.9 inches x 17.7 inches x 9.4 inches 18 inches x 21 inches x 17 inches 15 inches x 10 inches x 18 inches 15 inches x 18 inches x 10 inches
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Product Details

  • Product Dimensions: 17.7 x 9.4 x 14.9 inches ; 27.9 pounds
  • Shipping Weight: 32.2 pounds (View shipping rates and policies)
  • Shipping: Currently, item can be shipped only within the U.S.
  • Shipping Advisory: This item must be shipped separately from other items in your order. Additional shipping charges will not apply.
  • ASIN: B002RWK9LY
  • Item model number: EF1000iSC
  • Average Customer Review: 4.4 out of 5 stars  See all reviews (52 customer reviews)
  • Amazon Best Sellers Rank: #48,133 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden)

Product Description

Product Description

The Yamaha EF1000iS Portable Generator is the only external generator that powers your JUGS Pitching Machine when AC power just isnt available. This handy generator weighs less than 30 lbs. and runs on gasoline for up to 3 hours. It is easy to carry and features a wide opening for clean and easy filling. The Yamaha EF1000is Portable Generator can be used with your JUGS Curveball, 101 Baseball, Combo, Jr., MVP, Softball, and Super Softball pitching machines.

Amazon.com

Powerful, portable, and efficient, the Yamaha EF1000iS 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 1,000 watts of clean AC power. It can run up to 12 hours continuously without refueling and uses premium technologies to maximize fuel efficiency.

Yamaha logo
Inverter EF1000iS generator
EF1000iS Inverter
At a Glance
  • Combines powerful output with portability
  • Inverter system allows you to power delicate machinery
  • Fuel-efficient; can run for 12 hours without refueling
  • Lightweight and easy to carry
  • Backed by a 2-year warranty
callout
Inverter EF1000iS generator

The innovative inverter system produces high-quality, clean electricity. View larger.
Powerful Inverter System Delivers Cleaner Electricity
The EF1000iS is built around an innovative inverter system, which is able to deliver higher-quality, cleaner electricity than competing generators. It produces energy in the form of pure sine waves, which are cleaner and more reliable than most commercial power sources.

In simpler terms, this means that you'll be able to confidently power delicate machinery without having to worry about the damage caused by unrefined energy.

Smart Technologies for Optimal Fuel Efficiency
The EF1000iS is exceptionally fuel efficient, able to run for up to 12 hours without refueling when in Economy mode. With its Smart Throttle Load feature, the generator is able to dynamically adjust engine speed depending on output, resulting in greater overall fuel efficiency. The generator also features an exclusive dual coil alternator stator, which lowers engine speed and reduces total fuel consumption.

Ergonomic, User-Friendly Design
At only 27.6 pounds, this generator is also ultra-portable and features an easy-to-carry design. It has a convenient, centralized control panel, which allows you to easily access all of the generator's features at the push of a button. For added convenience, the EF1000iS is even able to recharge 12-volt batteries with its 12-volt DC output, making it ideal for RV, auto, and boat owners.

Noise Reduction for Quiet Operation
The EF1000iS uses noise reduction technologies to ensure the quietest operation possible. Featuring a special sound-blocking design, the generator has a noise-absorbing glass wool construction, which helps dampen noise even during heavy operation. Along with the EF1000iS' super-quiet muffler, it helps keep noise to a minimum.

The EF1000iS is backed by a two-year warranty.

What's in the Box
Gas-powered generator




At only 27.6 pounds, the EF1000iS is ultra-portable and features an easy-to-carry design. View larger.


This EF1000iS recharges 12-volt batteries, making it ideal for RV, auto, and boat owners. View larger.

Customer Reviews

We have a Travel Trailer and love to camp!
E. Klick
GREAT LITTLE GENERATOR , Ive had no problems with mine, as long as its got gas it WILL run.
gil505
It is quiet and it is a very good gas saver.
S. Stewart

Most Helpful Customer Reviews

103 of 106 people found the following review helpful By HMMWV TOP 1000 REVIEWERVINE VOICE on May 14, 2010
I've used these with friends camping and been absolutely amazed. This model has a number of positives about it. Yamaha has produced small, reliable generators for over 15 years.

My big plusses:

1 - REALLY quiet. The engine drives basically just an alternator and produces about 12V, though it varries. When there is a small load on the generator (typical of most camping / outdoor uses) it slows down the engine. This not only makes it quiet, it cuts back on fumes, and saves gas. A tank filling can last half a day easily depending on demand.

2 - clean power. Because the alternator is outputting a DC voltage into a sinewave inverter your 110 VAC is comming from one of the best sources. I use inverters in many of my service vehicles, right at 1000W, and have found no situation where that was not enough power. Since the inverter tells the throttle how much power it needs, wasted noise and gas are eliminated. Basically it does not feel like the old 5000W genset on wheels.

3 - light weight. Compared to taking the 5000W generator camping, the small size and light weight are a welcome change.

4 - very small gasoline consumption. Unless you are running the full 1000W all the time you'll get great mileage. If you do need to run 1000W all the time, consider a larger digital inverter genset. Honda makes a 2000W which can be joined to a second 2000W for 4000 total if I recall.

5 - well built engine. Although only 50cc, it has overhead valves and excellent sound isolation.

Cons:

It's not going to run EVERYTHING in your RV at the same time. If you are watching the plasma TV (400W) and turn on the microwave (1000W) the generator will shut down due to the 1400W load.
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27 of 29 people found the following review helpful By S. Stewart on March 4, 2011
The previous review on this generator is correct. It is quiet and it is a very good gas saver. We use our generator for a 250 watt average load. With that load, the economy saver feature on this generator allows its 0.6 gallon tank to last a little over 12 hours!!

It is extremely quiet, just slightly louder than that of a good refridgerator.

Why the 4-star rating?

The Yamaha website doesn't appear to be too up-to-date on Yamaha Generator Service Shops. When we got our generator, it had a bad seal on it and the oil leaked out. When we looked on the Yamaha website, it showed two dealers in our area that fixed these generators. Neither one would take it. They said they stopped working on generators. I ended up having to drive over to the next town where the dealer told me that most dealers do not like to take generators unless they sold it to you themselves.

So, while I got lucky and found someone that would take it. Just be aware that you might not be so lucky. Before buying, call the dealers on the Yamaha website and ask them if they can fix a generator for you. Then you will have a better idea of what situation you are in before you buy.
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21 of 24 people found the following review helpful By viking on September 7, 2011
Verified Purchase
I wanted a smaller generator than the one built into my RV to save on gas and operate quieter. this little yamaha did the trick. I use a 50 foot extension cord and run it to my rv through the window. It can power my computer, battery chargers, and small appliances on its quiet, low power setting. I barely hear when it is running on low power if it is 50 feet from the RV. Uses only 1/2 gallon of gas if i run it all day. but you do need to go to a local Yamaha dealer and get the proper oil. make sure you read the instructions for this or you will burn out the motor.
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12 of 14 people found the following review helpful By P. maher on November 3, 2012
Verified Purchase
I'm in CT and lost power for 8 days last year. I vowed never to live in colonial times again and bought this generator just to run a pellet stove and a few lights when the power goes out. I was extremely happy when my Yamaha 1000is arrived two days early, just in time for hurricane Sandie. Of course now that I have a generator we didn't lose power. I added oil and fired it up to get ready for the storm. It started on the 5th pull right out of the box, and one pull after that. It is quiet, but still loader than I expected. Then again the Hondas I have heard were at a little distance so I might be expecting too much. Get a 50 foot cord and you won't hear it. It ran my pellet stove using manual ignition with no problem, about 500W. In econ mode it varies the speed when the feed motor kicks in like it should. For fun I disconnected the stove and ran a small microwave on it, about 850W. It stumbled but didn't kick out. Probably should not run econ mode with heavy loads, but it did take the load. It won't run your whole house, but manage your loads and this generator does the job on a minimal amount of gas which gets hard to come by when there is no power. Its small size makes it easy to store too. My Yammie is now drained of gas and sleeping in its box waiting for the next outage. My neighbors can't believe we didn't lose power during Sandie. I smile, because I know the reason we didn't lose power is because I bought this generator and that we will never ever lose power again. Lucky I camp so I can use the generator in the summer.
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8 of 9 people found the following review helpful By william toth on November 2, 2012
Verified Purchase
I do a lot alot of camping and use my Yamaha 3000 generator if I could rate it,it would be 5 stars.I bought the 1000 to run small power loads.Its great on gas and quiet but it doesn't run smooth and I can't believe the amount of silver particles I find during oil changes.I have 125 hours on it and has performed well so far.
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