This comprehensive service manual provides detailed instructions and technical specifications for the Mercury Mariner Outboard 40 Marathon 2 CYLINDER engine. It covers a wide range of procedures including troubleshooting, maintenance, repair, and overhaul. The manual is organized for easy navigation, with detailed diagrams, illustrations, and step-by-step instructions. You'll find everything you need to diagnose and repair your engine effectively, from basic tune-ups to major overhauls. This manual is an invaluable resource for anyone who wants to maintain and repair their outboard motor.

The Mercury Mariner 40 Marathon 2-cylinder outboard motor was a popular choice for recreational boaters seeking a reliable and affordable power source. Manufactured by Mercury Marine, a leading manufacturer of marine engines, the 40 Marathon was designed to provide reliable performance for a variety of small boats, including fishing boats, dinghies, and small recreational craft. This compact and lightweight outboard motor boasts a two-cylinder design, delivering optimal power-to-weight ratio. Its 40 horsepower output, coupled with its robust construction, ensured dependable performance even under demanding conditions. The Mariner 40 Marathon was known for its fuel efficiency, allowing boaters to enjoy extended time on the water without frequent refueling stops. Its simple design and easy maintenance also contributed to its popularity, making it a user-friendly choice for both experienced and novice boaters. This outboard motor is fitted with a number of features that enhance its operation and user experience. It features a robust powerhead, designed to withstand the rigors of marine environments. The 40 Marathon is equipped with a tilting mechanism, allowing for easy storage and transport. Its manual start system, combined with its reliable ignition system, ensured quick and trouble-free engine start-up. The Mariner 40 Marathon incorporates a corrosion-resistant exterior, protecting the engine from the harsh elements of salt water. Its integrated oil tank simplifies operation and reduces maintenance requirements. This combination of features made the 40 Marathon an attractive option for a wide range of boating enthusiasts seeking a balance of power, practicality, and affordability.