This service repair manual covers the 125 hp outboard motor for model years 1984 through 1989. Engineered as a 4-cylinder, 2-stroke motor, the 125 hp is designed for a variety of marine applications, emphasizing reliability and performance. This manual provides comprehensive information for the repair, maintenance, rebuild, refurbish, and restoration of these outboard motors. This English-language manual is a complete guide for servicing your 125 hp outboard motor. It includes detailed step-by-step instructions, diagrams, illustrations, and wiring schematics for all major components, including the powerhead, lower unit, trim and tilt, remote controls, and starter systems. You will find in-depth coverage of the fuel, ignition, lubrication, and cooling systems, along with essential troubleshooting procedures, diagnostic techniques, technical specifications, tightening torques, and safety guidelines, ensuring thorough understanding and effective maintenance.