This Service Repair Manual covers the Yamaha 20C Outboard motor, designed for reliable marine propulsion. This manual is applicable to units within the serial number range starting from 1001031-. While specific production years are not listed, the manual provides comprehensive coverage for maintaining and repairing this outboard motor. The purpose of this manual is to provide detailed information for the effective maintenance and repair of the Yamaha 20C Outboard. It includes sections on general information, specifications, general service procedures, fuel system, power unit, lower unit, bracket unit, electrical system, and troubleshooting. Additionally, it features a complete list of parts with diagrams and comprehensive technical data, ensuring that owners, mechanics, and technicians have the necessary resources to keep the outboard motor in optimal working condition.