This comprehensive service and repair manual provides detailed instructions and high-quality diagrams for maintaining and repairing your Mercury Mariner Outboard 40/45/50/50 Bigfoot (4-Stroke) engine. It covers a wide range of topics, including specifications, maintenance procedures, general information, outboard motor installation, electrical systems, ignition systems, charging and starting systems, timing synchronization and adjustment, wiring diagrams, fuel system components like the fuel pump and carburetor, emission systems, powerhead components including the cylinder head and cylinder block/crankcase, lubrication systems, mid-section components like clamps, swivel brackets, and the drive shaft housing, power trim systems for both older and newer models, manual tilt assist, gear housing variations for both Bigfoot and non-Bigfoot models, attachments, and control linkage including throttle and shift linkage, and the tiller handle. This manual is an essential resource for anyone looking to perform their own service or repairs on their Mercury Mariner outboard motor.

The Mercury Mariner Outboard 40/45/50/50 Bigfoot (4-Stroke) is a versatile and robust outboard motor designed for a range of boating applications. This series encompasses four models with varying horsepower outputs, each boasting reliable performance and fuel efficiency. The 40hp, 45hp, and 50hp models are renowned for their smooth operation and responsive acceleration, making them ideal for fishing, cruising, and recreational boating. The 50 Bigfoot variant features a larger, extended transom bracket, enhancing stability and providing greater versatility for larger boats. All models within this series are equipped with a four-stroke engine, known for its quietness, lower emissions, and enhanced fuel economy compared to two-stroke designs. These Mariner Outboard models are designed for simplicity and user-friendliness. They incorporate a variety of features designed to make maintenance and operation straightforward. These features include a single-lever control system for intuitive throttle and gear selection, a digital ignition system for reliable starting and performance, and a robust cooling system that ensures optimal operating temperatures, extending engine lifespan. The 40/45/50/50 Bigfoot series also boasts a durable, corrosion-resistant construction, ensuring longevity even in demanding marine environments. With its blend of power, reliability, and ease of use, the Mercury Mariner Outboard 40/45/50/50 Bigfoot (4-Stroke) represents a compelling choice for boaters seeking a dependable and efficient power source for their aquatic adventures.