This manual covers the 1998 Arctic Cat Cougar Deluxe snowmobile, a model renowned for its performance and reliability in its era. Arctic Cat, a long-standing name in powersports, engineered the Cougar line with a focus on rider comfort and operational efficiency. This particular model represents a significant evolution in snowmobile technology, featuring a robust liquid-cooled, 2-stroke engine, a Continuously Variable Transmission (CVT) system with advanced clutch technology, and a responsive chassis designed for varied snow conditions. Its construction emphasizes durability and ease of maintenance, making it a capable machine for recreational trail riding and exploring winter landscapes. The purpose of this comprehensive service repair manual is to provide detailed guidance for the maintenance, troubleshooting, and repair of your 1998 Arctic Cat Cougar Deluxe snowmobile. It includes factory-authorized procedures for all major systems, including the engine, fuel system, electrical components, powertrain, and chassis. Within these pages, you will find step-by-step instructions, diagnostic flowcharts, technical specifications, wiring diagrams, and numerous illustrations designed to assist owners, DIY enthusiasts, and professional technicians. This manual aims to empower users with the knowledge necessary to keep their snowmobile in optimal condition, ensuring longevity and maximizing performance while potentially reducing repair costs.