This manual pertains to Mercury Sno Twister snowmobiles from the 1974 to 1976 model years. These machines represent a significant offering from Mercury Marine within the mid-1970s snowmobile industry, designed for recreational trail use. The Sno Twister models, known for their engineering quality and reliability during their production, featured innovative 2-stroke rotary valve engines. This collection of tipsters and bulletins aims to provide essential guidance for operating and maintaining these vehicles. The purpose of this printed manual is to serve as a comprehensive resource for owners and technicians. It covers a range of technical bulletins and advisory notes, specifically addressing troubleshooting and maintenance tips relevant to the Mercury Sno Twister snowmobiles from the 1974-1976 period, identified by bulletin numbers 74-1 through 76-8. This English-language document, comprising 23 pages, is designed to assist in the proper upkeep and understanding of the vehicle's systems, ensuring optimal performance and longevity.