This manual pertains to the 1994 Yamaha 4MLHS Outboard motor, an internal combustion, gasoline-powered outboard motor designed for repair, maintenance, and service. Yamaha is renowned for its commitment to engineering excellence, delivering reliable and high-performance marine propulsion systems. The 4MLHS model exemplifies this dedication, offering robust construction and efficient operation for a variety of boating applications. This Factory Service Repair Maintenance Manual provides comprehensive guidance for the upkeep and repair of your Yamaha 4MLHS Outboard. It covers essential areas including general information, periodic inspections and adjustments, fuel system, power unit, lower unit, bracket unit, and electrical system. Detailed troubleshooting procedures, along with included diagnostic information, wiring diagrams, circuit diagrams, illustrations, photos, and exploded views, are presented in a clear, step-by-step format to assist owners, mechanics, and technicians in maintaining the optimal performance and longevity of the outboard motor.