This comprehensive Mercury MerCruiser Marine Engines Service Repair Manual is specifically designed for the 25 GM V-6 262 CID (4.3L) #25 engine. It provides detailed instructions for maintaining and servicing your engine, ensuring you have the knowledge and guidance to keep it running smoothly. The manual is organized into clearly defined sections to facilitate easy navigation, with an extensive Table of Contents and a comprehensive index for quick reference. Detailed illustrations, exploded diagrams, drawings, and photographs accompany each service repair procedure. The manual covers a vast array of topics, including: **General Information:** This section encompasses essential information about your engine, including safety guidelines, maintenance schedules, and general troubleshooting tips. **Removal and Installation:** This section provides step-by-step instructions for removing and installing various engine components, ensuring proper procedures are followed. **Engine:** This section delves into the heart of your engine, covering topics such as engine specifications, engine components, and critical procedures for maintaining and servicing the 262 CID / 4.3L engine. **Electrical Systems:** This section covers all aspects of your engine's electrical system, including the starting system, ignition system, charging system, instrumentation, and wiring diagrams. **Fuel Systems:** This comprehensive section details the workings of your fuel system, encompassing both carbureted and electronic fuel injection systems. It includes explanations of system operation, disassembly and reassembly procedures, troubleshooting techniques, and diagnostic information. **Cooling System:** This section provides detailed information on both seawater and closed-cooled models, offering essential knowledge for maintaining the integrity of your engine's cooling system. **Exhaust System:** This section covers the exhaust system in detail, including information on manifolds, elbows, risers, and collectors. **Drives:** This section provides instructions on servicing and maintaining the drive shaft models associated with your engine. **Power Steering System:** This section covers the pump and related components of your power steering system. This manual is an invaluable resource for anyone looking to perform tune-ups, routine maintenance, or necessary repairs on their Mercury MerCruiser 25 GM V-6 262 CID (4.3L) #25 engine. With its wealth of technical information and step-by-step instructions, it ensures you have all the knowledge you need to keep your engine performing at its best.

The Mercury MerCruiser 25 GM V-6 262 CID (4.3L) #25 is a popular and reliable marine engine that has powered countless boats for decades. This engine, often referred to as the "GM 4.3L" due to its origins as a General Motors design, boasts a compact yet powerful V6 configuration with a displacement of 262 cubic inches (4.3 liters). This engine found its way into a multitude of applications, from sleek runabouts to spacious cruisers and even some personal watercraft. Its reputation for dependability, ease of maintenance, and relatively affordable cost made it a favorite choice for many boat owners. The "25" designation reflects the engine's horsepower rating, indicating a substantial output for its size. The Mercury MerCruiser 25 GM V-6 262 CID (4.3L) #25 engine is known for its smooth operation and impressive torque, making it suitable for a variety of boating activities. While its smaller size might not be ideal for high-speed applications, it provides ample power for recreational boating, fishing, and cruising. The engine's design incorporates features like a cast-iron block and aluminum heads, balancing strength and weight. It also features a fuel-injected system for optimal fuel efficiency and performance. The MerCruiser 25 GM V-6 262 CID (4.3L) #25 is a testament to Mercury Marine's commitment to producing reliable and robust marine engines that meet the demands of recreational boaters. Its widespread use as a power source for a diverse range of boat types speaks to its versatility and enduring popularity.