The Yamaha ef2000is inverter generator is exceptionally fuel efficient, able to run for up to 10.5 hours without refueling when in Economy mode.
Yamaha ef 2000 is O.H.V. engine runs reliably and dissipates heat efficiently, allowing for both a long life and optimal fuel consumption.
It instantly changes it’s operating speed quite as fast as I can move the speed switch on an 1850 watt hair dryer I used to test it. It doesn’t include oil, and the angle of the oil fill hole is nearly horizontal, making it a little difficult to fill even with a funnel, but they did put a nice little drip tray right below the opening, so it doesn’t go everywhere. The gas gauge is nice. Made in Japan.
It quickly powers drills, mills, skill saws, table saws, walls, and portable cement mixers – pretty enough anything that draws under 16.7 A.M.P.S. Most power tools draw up to and under 15 A.M.P.S. My industrial right-angle concrete drill only draws 8 A.M.P.S., and that thing is great. It remains more than adequate for my needs for working in the woods where I can’t just “Plug In.”
The most impressive thing about this unit is how quiet it is. Even at full engine speed you can stand about 6 feet away plus have a normal conversation without raising your voice, or talk on a cell phone without undue distraction. It features an “eco” setting that tapers down the engine throttle and noise when the 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’ve had two Yamaha ef2000is generators since the beginning of Sept 2010 and have mainly used them for camping. The first work for both of these units did tailgating. I also have a cord that connects the 2 of them to make 4000 watts, more than enough to control your camper A/C (13,000-15,000 B.T.U.) and everything other in the R.V. However, it was colder on this outing, plus I didn’t need to use both hooked together yet.
The guy next to me brought his 6000 watt Champion generator, which is construction grade, and told me he was sorry, but would continue running it in the mornings. We were about 15 feet away from him. I said no problem; it could not be that loud. He then turned it on for me so I could see. WOW! That thing was LOUD. I told him I brought a spare Yamaha inverter, and he was welcome to use mine because I said it would be much quieter. He came over and heard mine running also couldn’t believe it. The next morning we did both sleepings soundly, both of us running these select Yamaha units.
You can also safely power computers, charge cell phones, and iPods, run a T.V. and D.V.D. player, and plenty of other things, if that’s what you’re into while camping, or in an emergency situation.
It starts up easy. Mine started opening pull right out of the box (make sure to put oil in it first, it does not cover), and still does every time. If you run it in Eco Mode (tv’s, appliances, etc.) I’m not sure how long the tank will last you hour-wise, I haven’t used it for that application yet, but in full power mode, meaning you’re always getting the excited R.P.M.s for more amperage, the one-gallon tank lasts for about 6 hours or so. I’d figure that it’d almost double so in Eco mode, and it’s twice as quiet. You can stand right next to it, and it’s a little human.
I give the Yamaha EF2000iS five stars hands down for the price and performance. I’m triumphal I didn’t go ahead and go with a knock off lesser brand. It did well worth the more money for something that’s going to be reliable and dependable. There’s no sense in paying $500 or less for something that’s just going to be junk in a few months.
If you need a medium duty Inverter-Generator, I highly recommend it. You will enjoy it. It’s also very light and compact. Transporting it isn’t a problem at all.