The Mercury Mariner SeaPro is a robust 55 HP, 2-stroke outboard motor engineered for reliability and performance. With a displacement of 968cc and a water-cooled system, this motor is designed for demanding marine applications. It features a carbureted fuel system, CDI ignition, and options for 20" (L) or 25" (XL) shaft lengths, making it a versatile choice for various boat configurations. The Mariner SeaPro embodies Mercury's commitment to quality marine propulsion. This workshop service repair manual provides comprehensive guidance for the Mercury Mariner SeaPro outboard motor. It covers essential maintenance procedures, detailed troubleshooting steps, technical specifications, and safety information. The manual is designed to assist owners, mechanics, and technicians in effectively maintaining and repairing the motor, ensuring its optimal performance and longevity. All information is presented in English.