This comprehensive service repair manual is specifically designed for Mercury Mariner Outboard 30/40 FourStroke models starting from 1999 with serial numbers 0G760300 and later. It provides a complete and detailed guide for servicing and repairing these outboard motors. The manual is a valuable resource for mechanics, enthusiasts, and anyone who wants to maintain and repair these engines. The manual is organized into sections covering various aspects of the outboard motor. Section 1 covers essential information including specifications, maintenance procedures, general information, and installation guidelines. Section 2 focuses on the electrical system, providing detailed information on the ignition, charging and starting system, timing, synchronizing, adjusting, and comprehensive wiring diagrams. Section 3 delves into the fuel system, including the fuel pump, carburetor, and emissions components. Section 4 covers the powerhead, including the cylinder head, cylinder block/crankcase, and lubrication system. Section 5 focuses on the mid-section, providing information on the clamp/swivel brackets, drive shaft housing, power trim, and manual tilt assist system. Section 6 provides detailed instructions on the lower unit, specifically covering both non-Bigfoot and Bigfoot gear housing. Section 7 covers attachments and control linkages, such as throttle/shift linkage and tiller handle. Section 8 provides information on the manual starter, and finally, Section 9 includes detailed color diagrams for clear visual understanding.

The Mercury Outboard 30/40 4-Stroke Service Repair Manual is an essential resource for anyone looking to maintain, troubleshoot, or repair a Mariner outboard motor powered by the Mercury 30 or 40 horsepower 4-stroke engine. This comprehensive manual provides detailed instructions and diagrams covering every aspect of these popular outboards, from basic maintenance tasks like oil changes and spark plug replacement to complex repairs involving engine components, fuel systems, and electrical systems. The manual is organized in a logical and easy-to-follow format, with clear step-by-step instructions and numerous illustrations to guide users through each procedure. The Mercury 30/40 4-stroke engine is known for its reliability, fuel efficiency, and smooth operation, making it a popular choice for a wide range of boaters. These engines are designed for durability and are equipped with advanced features such as electronic ignition, fuel injection, and a multi-point fuel injection system for optimal performance and reduced emissions. The manual thoroughly covers these features, providing insights into their operation and troubleshooting techniques. Whether you're a seasoned mechanic or a DIY enthusiast, the Mercury Outboard 30/40 4-Stroke Service Repair Manual equips you with the knowledge and tools necessary to keep your Mariner outboard running smoothly and reliably. This valuable resource ensures that you can confidently address any maintenance or repair needs, extending the life of your outboard motor and maximizing your enjoyment on the water.