The Yamaha EF1000iS is a portable inverter generator designed for recreational use, home backup, and jobsite applications. This gasoline-powered unit features a 4-stroke, OHC engine with a displacement of 71 cc, capable of producing 900 watts of rated output and 1000 watts of maximum output at 120V and 60Hz. Its compact design, weighing just 27.9 lbs, and quiet operation, with noise levels between 52 dBA and 61 dBA, make it a versatile and reliable power solution. The generator is engineered for efficiency and durability, ensuring consistent performance across various operating conditions.

This Service Repair Manual provides comprehensive guidance for the Yamaha EF1000iS portable inverter generator. It covers essential maintenance procedures, detailed troubleshooting steps, technical specifications, and important safety guidelines. Written in English and fully bookmarked, searchable, and indexed, this manual is an indispensable resource for owners, mechanics, and technicians. It is designed to assist users in understanding, maintaining, and repairing the generator, ensuring its optimal performance and longevity.