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Yamaha EF2400iS

We listened to what our customers wanted when we built our latest inverter generator. The result is the EF2400iS. Not only is it super-quiet (53-58dBA), it only weighs 70 pounds and produces 2400 watts of maximum power. Cleaner, quieter and more powerful, the EF2400iS is the next step forward in generator technology.


  • TwinTech™ capability - Hook up two EF2400iS’s for 4600 watts of maximum power.
  • Auto-decompression system - Reduces compression for easier starting.
  • Gasoline petcock - Helps prevent carburetor contamination during storage.
  • Controls all on one panel - Easy access to controls.
  • Smart Throttle™ varies engine speed based on load - Improves fuel economy and reduces noise.
  • Comfortable grip handles - Easy portability and storage.
  • Fuel gauge - Ability to gauge fuel level without opening cap.
  • OilWatch warning system - Prevents engine damage • Provides added peace of mind.
  • Electrical overload breaker - Prevents generator damage in case of overload.
  • Super-quiet muffler with USFS-approved Spark Arrestor - Only 53 dBA at 1/4 load...eliminates errant sparks.
  • Die-cast aluminum frame - Light weight, high strength.
  • Inverter system with Pulse Width Modulation (PWM) control - Can run products with built-in microcomputers or microcomputer-controlled electric tools.
  • DC outlet - 8A12V outlet for charging batteries (cables included).
  • Rubber vibration isolation feet - Absorbing feet for increased smooth operation and noise reduction.
  • Multipole alternator - Light, compact design with great power output to weight ratio.
  • OHV engine with cast iron cylinder liner - Efficient, reliable, powerful providing long life and excellent heat dissipation.
  • Easily detachable side panels - For easier serviceability.
  • Noise Block™ sound reduction system - Very quiet.
    S P E C I F I C A T I O N S
    TYPEBRUSHLESS INVERTER
    MAXIMUM AC OUTPUT2400 watts
    RATED AC OUTPUT2000 watts
    RATED / MAXIMUM AC CURRENT16.7 / 20 amps @ 120V
    VOLTAGE STABILITY+/- 1%
    12 VOLT DC OUTPUT+/- 0.1HZ
    ENGINEYAMAHA OHV AIR COOLED 4 STROKE SINGLE CYLINDER
    DISPLACEMENT / HP171cc / 5.5 hp
    G E N E R A L
    OVERALL LENGTH20.7"
    OVERALL WIDTH16.5"
    OVERALL HEIGHT18.1"
    DRY WEIGHT70 lbs.
    FUEL TANK CAPACITY1.6 gallons
    CONTINUOUS OPERATION AT 1/2 RATED LOADOver 8.5 hours
    NOISE LEVEL53dBA / 58dBA
    WARRANTY2 YEARS Limited Warranty




    Claude Sudderth - Website designed and written by Claude Suddreth === Herb Sudderth Systems