This comprehensive workshop repair manual provides detailed instructions and step-by-step diagrams for all repair procedures on your MERCURY MarineR OUTBOARD 30HP MARATHON SEA PRO 2 STROKE engine, covering models from 1997 onwards. From basic maintenance like changing spark plugs to complex tasks like engine rebuilds, this manual is your ultimate resource. You'll find everything you need, including electrical diagrams, torque settings, fluid capacities, and detailed service and repair procedures, giving you the same level of information used by professional technicians. This manual is designed to help you understand your engine and perform repairs confidently, ensuring your MERCURY MarineR engine runs at its best.

The MERCURY MarineR 30HP Marathon Sea Pro 2 Stroke outboard motor, manufactured from 1997 onwards, was a robust and reliable powerplant designed for a wide range of recreational boating applications. This two-stroke engine, renowned for its power-to-weight ratio, was favored by boaters seeking a powerful and compact option for smaller crafts. Its 30 horsepower output, coupled with a smooth and responsive throttle, provided ample propulsion for fishing boats, dinghies, and small runabouts. The Sea Pro moniker indicated its suitability for saltwater conditions, highlighting its corrosion resistance and durability. The Marathon 30HP engine featured a number of key attributes, including a durable cast-iron powerhead, a reliable ignition system, and a robust cooling system designed for sustained operation. It also incorporated features like a manual choke lever for cold-start assistance and a fuel tank vent to prevent fuel starvation. The engine's robust construction, combined with MERCURY's well-respected reputation for quality and performance, resulted in a reliable and long-lasting boating companion for numerous enthusiasts. The engine's simplicity and straightforward maintenance requirements made it a popular choice for DIY boaters, while its comprehensive workshop manual provided detailed instructions for all repair and maintenance procedures.