Standard Features
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Conquer power.

Featuring the most powerful engine in its class, the EF45000iSE runs at a very low 2,600 revolutions per minute reducing fuel consumption, noise and engine wear. It's also incredibly resilient, with an oil warning system that automatically shuts the engine down when oil is low, and a cast iron cylinder lining to ensure consistent performance.


Model Year
Starting at MSRP


30.7 in. (780 mm)
27.2 in. (692 mm)
24.3 in. (616 mm)
220 lbs. (100 kg) dry


MZ360, OHV, 2-valve, 4-stroke
357 cc
Air (fan-assist)
Run Time
15.2 hrs. @ 1/4 load
7.4 hrs. @ rated load
Fuel Type
87 octane regular gasoline
Fuel Tank Capacity
17 l
Oil Capacity
1.3 l


Maximum AC Output: 4,500W
Rated AC Output: 4,000W
AC: 120V
Regulator: Inverter (Pulse Width Modulation)
Maximum / Rated AC Output: 37.5 / 33.3A

Standard Features

 Powered by Yamaha's MZ360; 357 cc, air-cooled (fan assist), OHV, 2-valve, 4-stroke, single cylinder engine with electronic transistor controlled (TC) ignition  
 Engine rpm is a low 2,600 rpm to reduce noise and fuel consumption  
 Super convenient key operated electric starting  
 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 4,000W / 33.3A  
 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  
 Auto choke for easy, no hassle starting  
 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  
 Power meter indicates the amount of power being used and what's available  
 Hour meter displays the accumulated running time in order to monitor service intervals  
 Washable foam air filter reduces maintenance costs  
 Cleanable spark arrestor stops the possibility of sparks from exiting the exhaust  
 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 filler hole. Fuel gauge is standard  
 4 built-in wheels, with parking brake, provides greater portability  
 CSA approved (Canadian Standards Association)  
 EPA and 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  

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