This comprehensive service and repair manual is specifically designed for the 1998 Mercury Mariner 25 BIGFOOT Hp 4-stroke outboard motor. Within its pages, you'll discover a wealth of information to guide you through every aspect of maintaining and repairing your engine. From essential safety precautions and troubleshooting tips to detailed procedures for electrical systems, fuel systems, powerheads, mid-sections, lower units, attachments, control linkages, manual starters, outboard motor installation, oil injection systems, power trim, and gear housing components – this manual equips you with the knowledge to address virtually any issue you may encounter. This manual provides a thorough understanding of your engine's inner workings, enabling you to perform maintenance tasks with confidence and tackle even the most complex repairs.

The Mercury Mariner 25 BIGFOOT outboard motor, manufactured in 1998, was a reliable and popular choice for small boats and dinghies. This compact 4-stroke engine boasted a robust design and efficient fuel consumption, making it ideal for leisurely fishing trips, recreational boating, and tender operations. The BIGFOOT moniker highlighted its powerful performance, offering a maximum output of 25 horsepower. This was achieved through a single-cylinder configuration and a displacement of 499 cc. The engine featured a durable cast-iron cylinder block and an efficient cooling system to ensure optimal performance and longevity. The 1998 Mercury Mariner 25 BIGFOOT outboard motor was known for its user-friendly operation. Featuring a simple control system and intuitive maintenance procedures, it was a suitable option for both experienced boaters and beginners alike. While the engine was primarily designed for freshwater applications, it could also be used in saltwater environments with proper maintenance and care. Its compact size and lightweight design made it easy to transport and install on a variety of boats. Additionally, the manufacturer provided a factory service repair manual that offered detailed instructions and specifications for routine maintenance, troubleshooting, and repairs. This comprehensive manual empowered owners to maintain their engines effectively and extend their lifespan.