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Yamaha EF6600A
The most powerful member of the Heavy-Duty family of Yamaha Generators, the EF6600A delivers full-time dual 120/240-volt AC outputs to the tune of 6400 maximum watts. This generator can operate heavy-load equipment like heaters and air compressors. And it offers an excellent mix of performance and value as it features the same engine and alternator as the EF6600DE. In addition, its 4-point mounting system and oversize muffler provide quiet operation. It also features a newly designed, easy-to-use control panel.
F E A T U R E F U N C T I O N B E N E F I T
Dual voltage
• Provides 120 and 240 volt operation
• Enhanced versatility
OHV engine
(overhead valve)
• Precise valve actuation
• Heavy-duty design
• Improved efficiency
• Increased reliability
• Quieter operation
Cast iron cylinder lining
• Optimal heat dissipation
• Provides consistent performance during continuous use
Brushless alternator
• Reduces maintenance requirements
• Clean output — high surge
• No maintenance
• Years of worry-free service
Oil Watch warning system
• Automatically shuts off before oil level is low
• Cannot be re-started until oil is added
• Prevents engine damage
• Avoid costly repairs
• Minimizes down time
• Provides added peace of mind
• Enhances long-term durability
Auto Voltage Regulation
• Guarantees correct power delivery even with extension cords
• Enhanced performance
• Added convenience
Transistor Controlled Ignition (T.C.I.)
• Provides clean, efficient spark
• Ensures fast, easy starting
• Reliable operation
• Maintenance free
Noise Suppressor
• Reduces electrical interference with TVs and radios
• Added convenience
Auto Decompression
• Automatically "opens" valve slightly to reduce initial backpressure when starting
• Effortless manual starting
USFS-approved Spark Arrestor
• Keeps sparks from exiting exhaust system
• Reduces chance of fires caused by an errant spark
• Quiet operation
AC Non-fuse Thermal Breaker
• Protects AC circuit in case of an overload
• Peace of mind
• Added durability
Ground Fault Interrupter (G.F.I.)
• If the system senses a leak to "ground," it automatically cuts off power
• Helps prevent injuries
Tool Kit
• Makes service easier
• Added value

S P E C I F I C A T I O N S
TYPE BRUSHLESS, AVR AC GENERATOR
MAXIMUM AC OUTPUT 6400 watts
RATED AC OUTPUT 5700 watts
RATED / MAXIMUM AC CURRENT 47.5 / 53.3 amps @ 120V
23.8 / 26.7 amps @ 240V
ENGINE OHV, AIR-COOLED, FOUR-STROKE, SINGLE CYLINDER
DISPLACEMENT / HP 357cc / 12 hp
G E N E R A L
OVERALL LENGTH 26.8"
OVERALL WIDTH 20.1"
OVERALL HEIGHT 21.0"
DRY WEIGHT 167.2 lbs.
FUEL TANK CAPACITY 1.8 gallons
CONTINUOUS OPERATION AT 1/2 RATED LOAD 2.75 hrs.
NOISE LEVEL 76.0 dBA
WARRANTY 2 Years Limited Warranty
*Price and specifications subject to change without notice
Please read your Owner's Manual and all labels before operation.
For a free brochure, call 1-800-88-YAMAHA