This manual covers the Mercury Mariner 55 SeaPro outboard motor, a 2-stroke gasoline engine designed for reliable performance on the water. While specific production years are not detailed, this factory service repair manual provides comprehensive information for mechanics and DIY enthusiasts. The Mariner 55 SeaPro is engineered for demanding marine applications, offering 55 horsepower and a water-cooled system for efficient operation. Its robust construction and proven design ensure dependable power for various boating needs.

The purpose of this manual is to serve as a complete guide for maintaining and repairing your Mercury Mariner 55 SeaPro outboard motor. It includes detailed instructions for repair procedures, adjustments, disassembly and assembly, and diagnostic checks. Technical specifications, along with information on lubrication and ignition systems, are also covered. By following the procedures outlined herein, owners and technicians can ensure the longevity and optimal performance of their motor, addressing potential issues and performing routine maintenance effectively.