The Yamaha 40ESRW is a 1998 model outboard motor designed for marine propulsion. This 2-stroke gasoline engine delivers 40 horsepower and features an outboard drive system, representing Yamaha's commitment to reliable and efficient marine engineering. Its robust construction and performance-oriented design make it a dependable choice for various boating applications. This Factory Service Manual, written in English, provides comprehensive guidance for the maintenance and repair of your Yamaha 40ESRW outboard motor. It covers essential topics including general information, periodic inspections and adjustments, fuel system, power unit, lower unit, bracket unit, and electrical system. With detailed step-by-step instructions, diagnostics, illustrations, photos, exploded views, and detailed wiring and circuit diagrams, this manual is an indispensable resource for owners and technicians alike to ensure optimal performance and longevity of the unit.