Yamaha EF4000DE

You could call the EF4000DE the "all-star utility infielder" of the generator field. That's because it does everything well — quietly and efficiently — and still has power in reserve. The heart of the EF4000DE is an all-new 251cc overhead valve engine with a unique combustion chamber design that enhances power output and efficiency. And thanks to its extra-large fuel tank, the EF4000DE can run continuously for 10.6 hours without refueling. Finally, its compact size makes it highly portable. To that you can add the convenience of electric starting. All this makes the EF4000DE perfect as backup power for the home... or a hard worker on the construction site.

F E A T U R E

B E N E F I T

•	Dual voltage

•	Enhanced versatility

•	OHV engine (overhead valve)

•	Improved efficiency
•	Increased reliability
•	Quieter operation

•	New combustion chamber design

•	Improves power output
•	Improves efficiency

•	Cast iron cylinder lining

•	Provides consistent performance during continuous use

•	Brushless alternator

•	No maintenance
•	Years of worry-free service

•	Oil Watch warning system

•	Prevents engine damage
•	Avoid costly repairs
•	Minimizes down time
•	Provides added peace of mind
•	Enhances long-term durability

•	Transistor Controlled Ignition (T.C.I.)

•	Ensures fast, easy starting
•	Reliable operation
•	Maintenance free

•	Noise Suppressor

•	Added convenience

•	Auto Decompression

•	Effortless manual starting

•	USFS-approved Spark Arrestor

•	Reduces chance of fires caused by an errant spark
•	Quiet operation

•	Fuel Gauge

•	Lets operator monitor how much fuel is left

•	Electric starter

•	Ease of operation

•	Economy idle

•	Improved fuel efficiency
•	Quieter operation

•	Auto-choke system

•	Improves starting in cold weather

•

Voltmeter

•	Added convenience

•	AC Non-fuse Thermal Breaker

•	Peace of mind
•	Added durability

S P E C I F I C A T I O N S
TYPE	BRUSHLESS, AC GENERATOR
MAXIMUM AC OUTPUT	4000 watts
RATED AC OUTPUT	3500 watts
RATED / MAXIMUM AC CURRENT	29.0 / 33.0 amps @ 120V 15.0 / 17.0 amps @ 240V
ENGINE	OHV, AIR-COOLED, FOUR-STROKE, SINGLE CYLINDER
DISPLACEMENT / HP	251cc / 8.5 hp
G E N E R A L
OVERALL LENGTH	31.7"
OVERALL WIDTH	20.7"
OVERALL HEIGHT	20.1"
DRY WEIGHT	145.5 lbs.
FUEL TANK CAPACITY	4.8 gallons
CONTINUOUS OPERATION AT 1/2 RATED LOAD	10.6 hrs.
NOISE LEVEL	69.0 dBA
WARRANTY	2 Years Limited Warranty