Yamaha EF2000iS 2,000 Watt 79cc OHV 4-Stroke Gas Powered Portable Inverter Generator (Non-CARB Compliant)

Buy Cheap Yamaha EF2000iS 2,000 Watt 79cc OHV 4-Stroke Gas Powered Portable Inverter Generator (Non-CARB Compliant)

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Features Light Weight - 44 pounds - easy to move, transport and store. Super-quiet muffler with USFS-approved Spark Arrestor - Only 51.5 dBA at 1/4 load and eliminates errant sparks. Compact - 2.2 cu.ft. easy to store and transport. TwinTech™ capability - Hook up two EF2000iS’s for 3600 watts of maximum power. Extended Engine Emission Life Rating - Longest engine emission life rating issued by EPA. OHV engine with cast iron cylinder liner - Efficient, reliable, powerful providing long life and excellent heat dissipation. Smart Throttle™ varies engine speed based on load - Improves fuel economy and reduces noise. Inverter system with Pulse Width Modulation (PWM) control - Can run products with built-in microcomputers or microcomputer-controlled electric tools. Gasoline petcock - Helps prevent carburetor contamination during storage. OilWatch warning system - Prevents engine damage and provides added peace of mind. Fuel gauge - Ability to gauge fuel level without opening cap. Auto Warm Up – Increases engine speed during cold starts to handle high power demand appliances right away. Auto-decompression system - Reduces compression for easier starting. Comfortable grip handles - Easy portability and storage. Electrical overload breaker - Prevents generator damage in case of overload. Controls all on one panel - Easy access to controls. DC outlet - 8A12V outlet for charging batteries (cables included). Rubber vibration isolation feet - Absorbing feet for increased smooth operation and noise reduction. Easily detachable side panels - For easier serviceability. Noise Block™ sound reduction system
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Technical Details

- 2,000 Watt Maximum AC Output/1,600 Watt Rated AC Output
- Super-quiet muffler with USFS-approved Spark Arrestor
- Smart Throttle varies engine speed based on load
- Inverter system with Pulse Width Modulation (PWM) control
- Compact - 2.2 cu.ft. easy to store and transport.
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Customer Buzz

"EF2000is review - high quality and very quiet" 2009-11-14
By trisailor (CT, USA)
I have had this for about a month. This is a very high quality unit, nicely designed. I chose it over the Honda Eu2000i because it has a fuel gage and is a hair lighter (2 pounds), and liked the styling better. Specs are so close it's a tie... the Yamaha unit specs a bit quieter in "eco" throttle but the Honda specs a bit quieter at full power. Prior to this purchase I had bought a Honeywell inverter generator (a much less expensive Chinese-made knock-off) from Costco which I returned, because I was unimpressed with the Honeywell unit's quality and noise level. While the price difference is major, you get what you pay for in this case. Anyone looking at the cheaper knock-offs should really consider that a 5db increase in noise level is about twice as loud, the way humans perceive it.

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.

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 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. If generators are abused it will lead to regulations banning them.

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.

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