This manual covers the 2005 Polaris Fusion snowmobile, a versatile platform designed for performance and rider enjoyment. Available with a range of Liberty twin 2-stroke engines from 499cc to 899cc, the Fusion models, including the XC SP, XC SP Edge, XC SP M-10, and 900 Fusion, offer robust power and handling. These liquid-cooled, fuel-injected (EFI) or carbureted machines are engineered for reliability and are equipped with a Continuously Variable Transmission (CVT) featuring Polaris P-85 primary and P-90 secondary clutches. The Fusion's design emphasizes rider comfort and control, with a focus on delivering an exceptional snowmobiling experience across various conditions. This comprehensive Factory Service Repair Workshop Manual in English provides detailed information for owners, independent repair shops, and technicians. It covers all essential aspects of maintenance and repair, including engine mechanicals, fuel systems, clutching and drivetrain, brake systems, steering and suspension, and the electrical system. The manual includes routine maintenance procedures, troubleshooting guides, engine overhaul instructions, and detailed wiring diagrams. With extensive technical data, diagnostic charts, and high-quality diagrams, this manual empowers users to perform accurate and efficient repairs, ensuring the longevity and optimal performance of their 2005 Polaris Fusion snowmobile.