This document provides comprehensive service information for Yamaha Outboard Motors, specifically covering models C115X, 115X, S115X, B115X, 130X, S130X, and L130X. These 4-stroke marine propulsion units are engineered for reliability and performance, offering 115 and 130 horsepower options. Yamaha is renowned for its commitment to quality and innovation in marine engine technology, ensuring dependable operation for a wide range of watercraft. This Factory Service Repair Manual is designed to assist owners, technicians, and mechanics in maintaining and repairing these Yamaha outboard motors. It details essential procedures, including general information, specifications, periodic inspections and adjustments, fuel system, power unit, lower unit, bracket unit, electrical systems, and troubleshooting. By following the guidelines within this manual, users can ensure their Yamaha outboard motor operates at peak efficiency and longevity.