Review: Yamaha EF2000iS 2,000 Watt Portable Inverter Generator

Power Rating
Running / Maximum
1600 / 2000 watts
( Dry )
44 lbs
Noise Level 53 dba
Engine 79 cc
Warranty 3 Years
Average Price $1099
Best Found Price $989
Value 8/10
Reliability 9/10
Amazon Review Rating 4.7 / 5
Fuel Rating 10.5 hours
per tank


Editors Review.
Yamaha is best known for it’s engine reliability and easy of starting and the Yamaha EF2000iS is no different. This powerful unit puts out 1600 watts of continuous power but can handle surges of up to 2000 watts meaning it can power most small microwaves and power hogging devices in an RV or cabin. The unit is light – coming in at just 44 pounds not including gas or oil and is small enough to fit in the trunk of a compact car.  In comparison to the Honda Unit of comparable size – this unit is of excellent value and is one of the best generators on the market.

Customer Reviews: Yamaha EF2000iS 2,000 Watt Customer Review

The Yamaha EF2000iS has many features not found on models of it’s type – including

  • Powered by Yamaha’s MZ80; 79cc, air-cooled (fan assist), OHV, 2-valve, 4-stroke, single cylinder engine with electronic capacitor discharge (CD) ignition.
    Auto decompression system reduces engine compression to provide a light recoil starter pull for effortless manual starting.
    Cast iron cylinder liner provides excellent heat dissipation and extends service life.
    Pulse Width Modulation provides super “clean” power. As clean or cleaner than you get from a household receptacle.
    Rated AC output for continuous use is 1,600 watts / 13.3 amps.
    Bonded neutral
    Non-fuse type circuit breaker (NFB) prevents internal circuit damage in the event of an over load.
    Yamaha’s Noise Block body design features a moulded casing and noise-absorbing glass wool to provide ultra quiet operation.
    Smart Throttle / Economy Control automatically adjusts engine speed to match the load, saving fuel, reducing noise and engine wear.
    Manual choke
    Auto Warm Up (4 to 6 minutes) ensures consistent power delivery during cold start-ups.
    Yamaha’s Oil Watch Warning System automatically shuts off the engine when oil level is low and will not re-start until oil is added, preventing costly engine damage and enhancing long-term durability.
    Indicator lights for AC power output, low oil and AC overload.
    Washable foam air filter reduces maintenance costs
    12 Volt DC output and cables for charging RV, auto and marine 12-volt batteries.
    On-off fuel petcock lets you shut off the gas to run the carb dry for storage, helping to prevent stale fuel problems, which are becoming more common with ethanol based fuels.
    Large fuel fill hole and sealable vent on gas cap for easy filling and transporting. Fuel gauge is standard
    Cleanable spark arrestor stops the possibility of sparks from exiting the exhaust.
    Rubber feet isolate vibration for smoother operation and reduced noise.
    Suitcase style handle and light weight (21 kg / 46 lb) make the EF2000iS very portable.
    CSA approved (Canadian Standards Association)
    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.
    3-year warranty for “residential / home” use or “commercial use.”
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