This comprehensive Service Repair Manual provides a detailed guide for servicing and repairing your Mercury Mariner Outboard 25 Bigfoot 4-Stroke, covering models from 1998 and newer, starting with serial number 0G590000. The manual is packed with high-quality diagrams and easy-to-follow instructions that guide you through every step of the repair process. The manual covers a wide range of topics, including: * **Specifications:** Get detailed information about your engine's dimensions, capacities, and other technical specifications. * **Maintenance:** Follow the recommended maintenance schedule to keep your engine running smoothly and prevent future problems. * **General Information:** Understand the basics of your outboard motor, including its components and operating principles. * **Outboard Motor Installation:** Learn the proper procedures for installing your engine on your boat. * **Electrical System:** Diagnose and repair any electrical problems, including the ignition system, charging and starting systems, and wiring diagrams. * **Fuel System:** Troubleshoot and repair issues related to the fuel pump, carburetor, and emissions system. * **Powerhead:** Understand the internal workings of your engine's powerhead, including the cylinder head, cylinder block, crankcase, and lubrication system. * **Mid-Section:** Learn about the components and operation of the mid-section, including the clamp/swivel brackets, drive shaft housing, and power trim system. * **Gas Assist Manual Tilt:** Understand how the gas assist manual tilt system works and how to troubleshoot any issues. * **Lower Unit:** Diagnose and repair problems with the lower unit, including the attachments, control linkage, throttle/shift linkage, tiller handle, and manual starter. * **Color Diagrams:** Use the detailed color diagrams to quickly identify and locate components. This manual is an essential resource for anyone who wants to save money and gain the satisfaction of servicing their outboard motor themselves.

The Mercury Mariner Outboard 25 Bigfoot 4-Stroke, produced from 1998 onwards, is a robust and reliable outboard motor designed for small to medium-sized boats. This 25 horsepower engine boasts a four-stroke design, delivering smooth and quiet operation while maintaining exceptional fuel efficiency. The Bigfoot moniker denotes its long-shaft configuration, ideal for deeper hulls and boats with a higher freeboard. The 25 Bigfoot is known for its ease of use and maintenance, making it an attractive option for both seasoned boaters and newcomers alike. The engine's compact size and lightweight construction provide maneuverability and facilitate installation on various boat types. The Mercury Mariner 25 Bigfoot 4-Stroke is characterized by its durable and corrosion-resistant components, ensuring longevity even in harsh marine environments. Its efficient fuel system and advanced ignition system contribute to a dependable performance, minimizing downtime and maximizing enjoyment on the water. Features like electric start and a convenient tiller handle enhance user comfort and control. The engine's maintenance requirements are relatively straightforward, with readily available parts and detailed service manuals ensuring long-term operation. Overall, the Mercury Mariner 25 Bigfoot 4-Stroke is an excellent choice for boaters seeking a reliable, fuel-efficient, and user-friendly outboard motor for recreational use.