This manual covers the snowmobile models produced between 1972 and 1973. As a pioneer in the powersports industry, Polaris has a rich heritage in snowmobile innovation, and the Mustang represents a key phase in the evolution of these machines. These snowmobiles were designed for recreational trail riding and general snow conditions, embodying the engineering and design principles prevalent in the early 1970s. The Mustang line offered a blend of performance and reliability for its era, making it a notable entry in the burgeoning snowmobile market. This factory service manual provides comprehensive guidance for the maintenance, repair, and troubleshooting of your snowmobile. It details procedures for all major systems, including the engine, transmission, suspension, steering, brakes, electrical system, fuel system, and track system. With hundreds of detailed illustrations and diagrams, this English-language manual offers factory-level diagnostic and repair information. It is an essential resource for owners and technicians, enabling them to perform everything from routine maintenance like oil changes and spark plug replacements to complex repairs such as engine overhauls and clutch service, ultimately ensuring optimal performance and longevity.