This Service Repair Manual covers Mercury 30/40 4-Stroke Outboard models from 1999 and later, identified by serial number 0G760300 and up. Engineered for reliability and performance, these 4-stroke outboards are designed for a variety of marine applications. This manual details the 30 HP and 40 HP models, encompassing both Non-Bigfoot and Bigfoot gear housing options. This comprehensive English manual provides essential information for maintaining and repairing your Mercury outboard. It includes detailed procedures for general maintenance, lubrication, fuel system components, ignition, charging and starting systems, and electrical wiring diagrams. Additionally, it covers assembly of the mid-section, power trim, tilt assist, manual starter systems, tiller handle controls, and emissions systems, ensuring you have the resources needed for optimal performance and longevity.