2015 Yamaha EF4000DE


2015 Yamaha EF4000DE


Power to spare. A great home back-up power source and a hard worker on the construction site.


  • Full power, full time 120 / 240V dual voltage — Highly versatile
  • OHV engine — Improved efficiency, increased reliability, quieter operation
  • Advanced combustion chamber design — Improves power output and fuel efficiency
  • GFCI — Ground Fault Circuit Interrupter shut-off power. It senses a leak to ground to reduce risk of electric shock.
  • Cast iron cylinder lining — Provides long engine life and consistent performance during continuous use
  • Transistor Controlled Ignition (TCI) — Fast, easy starting, reliable operation, maintenance-free
  • Oil Watch Warning system — Prevents engine damage to avoid costly repairs and minimize downtime
  • Recoil starter — Dependable operation with auto decompression for easiest pull
  • Economy idle — Improved fuel efficiency and quieter operation
  • Auto-choke system — Easier starting, especially in cold weather
  • Voltmeter — Easy monitoring of power output
  • AC non-fuse thermal circuit breaker — Added durability and peace of mind
  • EPA and CARB Emission Engine Life Rating — Yamaha generators have the longest emission engine life ratings issued by the environmental Protection Agency and the California Air Resources Board
  • 50 state legal — Meets emission regulations, including CARB
  • Lifting eye — Convenient for hoisting
  • Electric starter — Ease of operation

General Information

Manufacturer Yamaha
Model Year 2015
Model EF4000DE
Model Code EF4000DE
Color Blue


Engine Make OHV, 4-stroke
Starting System Electric with recoil backup
Bore x Stroke 1
Displacement 357cc
Cooling Air
Fuel Tank Capacity 6.1 gal.


Weight 196.2 lbs. dry
Height 22.7 in.
Width 20.5 in.
Length 35.2 in.


Continuous Operating Hours 8.5 hrs. @ rated load
AC Frequency Maximum AC Output: 4,000WRated AC Output: 3,500W