This Parts Catalog covers the Yamaha EF4000 and EF4000D generators, designed for reliable portable power generation in home, recreational, and job site applications. These generators feature an air-cooled, 4-stroke, OHV engine with a displacement of 236cc, operating at 3600 RPM. They offer a rated AC output of 3000W and a maximum AC output of 4000W, with electrical specifications of 120/240V at 60Hz. With a 3.0 US gallon fuel capacity, they provide up to 8.2 hours of run time at rated load. The dry weight is 137 lb (62 kg), and the noise level is rated at 65 dB(A) at 23 feet with no load.

This manual provides essential information for identifying and ordering parts for your Yamaha generator. It details critical components, specifications, and maintenance requirements, including recommended oil type (SAE 10W-30) and oil capacity (0.63 US qt). Regular maintenance, recommended every 100 hours or annually, is crucial for optimal performance and longevity. This catalog serves as a comprehensive resource for owners, technicians, and service personnel to ensure the proper upkeep and repair of the EF4000 and EF4000D models, facilitating efficient operation and extended service life.