The Stihl FS 25-4 FS 65-4 Service Repair Workshop Manual is a comprehensive guide designed for both the experienced mechanic and the do-it-yourself enthusiast. This manual provides detailed instructions and high-quality diagrams, assisting you in understanding and performing repairs on your Stihl FS 25-4 and FS 65-4 equipment. It covers a wide range of topics, including: * **Introduction and Specifications:** This section familiarizes you with the basic principles and technical specifications of the FS 25-4 and FS 65-4 models. * **Clutch, Chain Drive, Chain Brake, and Chain Tensioner:** You'll learn about the inner workings of these critical components, including their assembly, maintenance, and troubleshooting procedures. * **Engine:** This section delves into the engine system, covering aspects like disassembly, rebuilding, and addressing common engine problems. * **Ignition System:** Learn about the ignition system's operation, troubleshooting techniques, and how to replace components if needed. * **Rewind Starter:** This section provides detailed instructions on the rewind starter mechanism, its operation, and how to handle any issues. * **AV Handle System & Master Control/Handle System:** Understand the intricacies of these systems and how to maintain them for optimal performance. * **Chain Lubrication:** This section discusses the importance of chain lubrication, proper techniques, and how to identify and resolve any lubrication issues. * **Fuel System:** This comprehensive guide covers the fuel system, addressing elements like fuel tank maintenance, carburetor adjustment, and troubleshooting fuel-related problems. * **Special Servicing Tools & Aids:** The manual provides information on essential tools and aids required for maintenance and repairs, ensuring you have the necessary equipment for efficient servicing. With its detailed instructions and clear diagrams, this service manual empowers you to confidently tackle repairs, ensuring your Stihl FS 25-4 and FS 65-4 equipment remains in top working condition.

The Stihl FS 25-4 and FS 65-4 are powerful and versatile brushcutters, designed for demanding tasks like clearing overgrown vegetation, trimming edges, and managing brush. They are part of Stihl's renowned line of professional-grade outdoor power equipment, renowned for their quality and performance. Both models feature a robust 4-stroke engine, offering exceptional efficiency and longevity. The FS 25-4 boasts a compact and lightweight design, ideal for smaller landscaping projects and maintaining intricate areas. It's powered by a 25.4 cc engine, delivering sufficient power for most residential tasks. Conversely, the FS 65-4 is built for larger, more demanding applications with its powerful 65.4 cc engine. It is equipped with a heavier-duty cutting head and features enhanced vibration damping, ensuring comfortable use for prolonged periods. Both the FS 25-4 and FS 65-4 are equipped with Stihl's signature anti-vibration system, minimizing operator fatigue and enhancing comfort during extended use. The ergonomically designed handles ensure a secure grip, while the adjustable loop handles offer optimal control and maneuverability. These brushcutters are also built with safety in mind, featuring a robust safety guard that protects the operator from debris and a convenient throttle lock that prevents accidental starting. Furthermore, the FS 25-4 and FS 65-4 are engineered with an innovative air filtration system that effectively removes dust and debris, extending the engine's lifespan and ensuring consistent performance. With their robust construction, powerful engines, and user-friendly features, these brushcutters are valuable tools for professionals and serious homeowners alike.