90-852572R1 – Mercury Mariner Service Manual 40–55HP (1998)

The 90-852572R1 Mercury Mariner 40/55HP Manual provides comprehensive, factory-issued instructions for maintaining and repairing 40HP, 50HP, and 55HP outboard engines from 1998. Covering key models in this horsepower range, it is an essential guide for mechanics, marine service centres, and boat owners looking for accurate technical information.

This service manual includes detailed explanations of systems such as ignition, fuel, cooling, power trim, electrical wiring, gearcase components, and midsection assemblies. Each procedure is supported by diagrams, part breakdowns, and torque specifications, ensuring accurate repairs and maintenance. Exploded-view illustrations help with part identification, assembly order, and troubleshooting.

The Mercury Mariner 40/55HP Manual (90-852572R1) also provides troubleshooting guides to help diagnose common issues. With its clear step-by-step instructions, this manual ensures that outboards in the 40–55HP range continue to deliver reliable performance on the water.

For U.S. models, this manual applies to engines with serial numbers 0G531301 and above. For Belgium-produced models, it applies to 09974454 and higher. This makes it suitable for late 1990s outboards produced worldwide.

Key Features:

• Part Number: 90-852572R1

• Models Covered: 40HP, 50HP, 55HP

• Year: 1998

• Includes torque specs, troubleshooting, and wiring diagrams

• Exploded-view illustrations for parts identification

• Covers midsection, gearcase, ignition, and trim systems

• Official Mercury Marine service guide

At Arizona Outboard Dismantlers, we stock reliable factory manuals and parts to keep your outboard running strong. The 90-852572R1 manual is a must-have reference for owners, technicians, and marine workshops servicing 1998 Mercury Mariner outboards in the 40–55 horsepower range.