Yamaha EF2400iS 2,400 Watt 171cc OHV 4-Stroke Gas Powered Portable Inverter Generator (CARB Compliant)

by Yamaha

Product Features

• 2,400 Watt Maximum AC Output/2,000 Watt Rated AC Output
• Smart Throttle varies engine speed based on load
• Comfortable grip handles - Easy portability and storage.
• Super-quiet muffler with USFS-approved Spark Arrestor
• Inverter system with Pulse Width Modulation (PWM) control

Product Details

• Shipping Weight: 84 pounds
• Shipping: This item is also available for shipping to select countries outside the U.S.
• Shipping Advisory: This item must be shipped separately from other items in your order. Additional shipping charges will not apply.
• ASIN: B002RWK9NM
• Item model number: EF2400iS
• Average Customer Review: 5.0 out of 5 stars  See all reviews (7 customer reviews)
• Amazon Best Sellers Rank: #87,640 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden)

Product Description

Amazon.com Product Description

Powerful, lightweight, portable, and efficient, the Yamaha EF2400iS 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 2,400 watts of clean AC power. It can run up to 8.6 hours continuously without refueling and uses the latest technology to produce the highest output in its class.

EF2400iS Inverter At a Glance Combines powerful output with portability Inverter system allows you to power delicate machinery Fuel-efficient; can run for 8 hours without refueling Lightweight (70 lbs.) and quiet (53 - 58 dBA) Backed by a 2-year warranty

The OHV engine provides excellent heat dissipation for long life. View larger.

Powerful Inverter System Delivers Cleaner Electricity
The EF2400iS 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, such as products with built-in microcomputers or microcomputer-controlled electric tools, without having to worry about the damage caused by unrefined energy. An electrical overload breaker is also included, to prevent generator damage in case of an unexpected overload.

Detachable side panels allow for easy maintenance.

Smart Technologies for Optimal Fuel Efficiency
The EF2400iS is exceptionally fuel efficient, able to run for up to 8.6 hours without refueling when in Economy mode. Its OHV engine runs reliably and dissipates heat efficiently, allowing for both a long life and optimal fuel consumption.

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 multipole alternator, which has a light, compact design with a great power-to-weight ratio for fuel economy.

Ergonomic, User-Friendly Design
Featuring a die-cast aluminum frame, the EF2400iS weighs only 70 pounds. It is ultra-portable and features comfort-grip handles and 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. It also starts up responsively due to its auto-decompression system, which reduces compression and makes startup less difficult.

TwinTech technology allows you to hook up two units for 4,600 watts of power. View larger.

For added convenience, the EF2400iS is able to recharge batteries with its 8A12V DC output (cables included), making it ideal for RV, auto, and boat owners. You can even hook up two EF2400iS units for 4,600 watts of maximum power, thanks to TwinTech technology. And you won't have to worry about engine damage due to low oil levels: an oil-watch warning system constantly monitors oil levels and lets you know when an oil change is needed. For further convenience, you can even gauge the fuel level without opening the cap and a gasoline petcock helps prevent carburetor contamination during storage.

Noise Reduction for Quiet Operation
The EF2400iS uses sound reduction technologies to ensure the quietest operation possible. Featuring a special sound-blocking design, the generator has noise-absorbing glass wool construction, which helps dampen noise even during heavy operation. And along with the EF2400iS' super-quiet muffler with USFS-approved Spark Arrestor, as well as vibration-isolating feet, this generator keep noise at a minimum (53 to 58 dBA).

The EF2400iS is backed by a two-year warranty.

What's in the Box
Gas-powered generator.

Product Description

2400 Watt Portable Generator EF2400iS

See all Product Description

Customer Reviews

Most Helpful Customer Reviews

13 of 13 people found the following review helpful:

5.0 out of 5 stars Lightweight and great!, June 9, 2008

By 

Handy Man88 "Handy Man" (East Coast) - See all my reviews

Received delivery of this generator on the day of a huge storm that swept through and knocked out power for 30 hours. This generator allowed me to pump out my full sump pit, keep my two fridges cold, and had the TV and fan running (all happened at separate intervals).

The best thing about this generator is how easy it is to use, and it's only 70 lbs. Fill up with gas and oil, switch the power on, gas on, choke, and pull. This generator is so quiet and has plenty of power to get you through a short term power outage.

Dollar for watts, this is the best inverter generator out there. If I ever need a 30 amp hookup (ie. for a transfer switch connected to a house panel), I can buy another one of these generators and set up a parallel hookup. Also, since it's lightweight and quiet, I can use it for other purposes like camping. I also bought the hour meter and cover.

This is a quality piece of equipment, made in Japan. Not the Harbor Freight special.

10 of 10 people found the following review helpful:

5.0 out of 5 stars Quite, powerfull and economical on fuel., January 30, 2010

By 

R. McMahon (Knoxville TN) - See all my reviews
(REAL NAME)   

This review is from: Yamaha EF2400iS 2,400 Watt 171cc OHV 4-Stroke Gas Powered Portable Inverter Generator (CARB Compliant) (Lawn & Patio)

Bought it to power our travel trailer AC which it does with no problem. Bigger fuel tank with gauge runs for ~7 hours. Have used it in power outages to run the house refrigerator, freezer, lights, computer, wood stove fan and TV. Easily paid for itself by keeping the freezer food frozen and the refrigerator running on one outage. Fits the front rack of the fourwheeler and powers portable tools, air compressor, hair clippers at the barn and around the farm. Been using for 5 years without a problem. Very quite. Two handles makes it easy to carry.

10 of 10 people found the following review helpful:

5.0 out of 5 stars Much Research and happy with choice, January 4, 2010

By 

Robert W. Satsky (Houston Tx) - See all my reviews
(REAL NAME)   

This review is from: Yamaha EF2400iS 2,400 Watt 171cc OHV 4-Stroke Gas Powered Portable Inverter Generator (CARB Compliant) (Lawn & Patio)

I purchased a Homelite 1800 from Home Depot. This gen was spec'd out about the same as the ef2400is. The Homelite was dimensionally samller then the Yamaha. Besides price that was the only win for the Homelite. The Yamaha is quieter and noticably better built. The engine on Homelite was a subaru which are fairly quite but still no contest between the two. I took the Homelite back to Home Depot and purchased the Yamaha. Main reason for switching to the Yamaha is the ability to start my 13,500 btu AC on my Trailmanor 2720. After starting the Yamaha several times I am really happy with the purchase. You do not have to pull the chord very much at all before is starts, and it only takes 1 pull.