This Factory Service Repair Workshop Manual covers the MERCURY Mariner outboard engines produced between 1988 and 1993. Designed for 70HP, 75HP, and 80HP variants, these professional-grade outboard engines are engineered for reliability and performance in a variety of marine applications. This manual provides comprehensive information to ensure the continued optimal operation of your Mercury Mariner outboard. The purpose of this manual is to provide detailed guidance for all repair, servicing, and troubleshooting procedures. It includes step-by-step instructions, detailed photos, diagrams, and exploded views to assist professional mechanics and technicians. By utilizing the very detailed content within this resource, users can effectively maintain and repair their Mercury Mariner outboard engines, ensuring longevity and peak performance.