This comprehensive workshop service repair manual provides detailed instructions and illustrations for all repair and service procedures on Mercury Mariner 115hp and 125hp 2-stroke outboard motors from model years 1997 to 2002. It covers all models, engines, trim, and transmission types. This manual is designed to help you save money by allowing you to perform your own repairs with confidence. You will find easy-to-follow, step-by-step instructions and diagrams for every aspect of servicing and repair. This manual is your complete resource for everything you need to know about maintaining and repairing your Mercury Mariner outboard motor.

The Mercury Mariner 115hp and 125hp 2-stroke outboard motors were popular choices for recreational boaters during their production run from 1997 to 2002. These powerful and reliable engines were known for their robust construction, smooth operation, and impressive performance. Both models were equipped with a 1.7-liter, two-cylinder, naturally aspirated engine, with the 125hp version boasting a slightly larger displacement and optimized tuning for enhanced power output. Both engines featured a direct-injection fuel system, a feature that ensured efficient fuel combustion and reduced emissions compared to earlier carburetor-equipped outboards. The Mariner 115hp and 125hp were available with a variety of gear ratios and propellers to suit different hull types and intended applications, from fishing boats to runabouts. These robust engines were known for their durability, often lasting for thousands of hours with proper maintenance. The Mariner 115hp and 125hp were renowned for their smooth operation and responsiveness, providing a pleasurable boating experience. However, their reliance on a two-stroke design meant they required a pre-mix of gasoline and oil for operation, which added an extra step to the fueling process. As environmental regulations evolved, these two-stroke engines were eventually phased out in favor of more fuel-efficient and emissions-compliant four-stroke models. Despite their discontinuation, the Mercury Mariner 115hp and 125hp remain popular choices for restoration and use in classic boats, thanks to their combination of power, reliability, and affordability.