This document pertains to the Yamaha F2.5A, a single-cylinder outboard motor with a displacement of 73 cc and a maximum power output of 2.5 HP. It features a Mikuni VM11/19 carburetor, CDI ignition, and water cooling. The transmission offers Forward-Neutral-Reverse functionality with a gear ratio of 2.08:1. This model is engineered for reliable performance and durability in marine applications. This Workshop Factory Service Repair Manual in English provides comprehensive guidance for maintaining and repairing the Yamaha F2.5A. It covers detailed service and repair procedures for the power unit, lower unit, bracket unit, and electrical systems. The manual includes information on periodic inspection and adjustment, lubrication with recommended Yamalube 2M oil at a 50:1 mixture ratio, and a troubleshooting section with trouble analysis. High-quality diagrams are included to facilitate understanding.