This workshop service repair manual covers the 2002 Arctic Cat ZL 800 EFI ESR snowmobile, a model from the ZL Series. Engineered for performance and reliability, this snowmobile features a robust 794cc 2-stroke, liquid-cooled engine with Electronic Fuel Injection (EFI) for efficient power delivery. It is equipped with an Electric Start (ESR) system for convenience, a Continuously Variable Transmission (CVT) with automatic wet clutches, and advanced suspension systems including AWS adjustable front suspension and Arctic Cat FasTrack rear suspension. Further enhancing its capability are plastic skis and a 15-inch wide track with 1.0-inch lugs, complemented by hydraulic disc brakes on both the front and rear. This comprehensive manual provides essential information for the maintenance, repair, and servicing of your Arctic Cat ZL 800 EFI ESR. It details critical procedures, technical specifications, and troubleshooting guides necessary for optimal performance and longevity. Owners, technicians, and mechanics will find valuable insights into engine diagnostics, transmission servicing, suspension adjustments, and brake system maintenance. The manual is presented in English and is fully printable, designed to be an indispensable resource for keeping your snowmobile in peak operating condition.