The Mercury Mariner 30 HP Sea Pro outboard motor, part of the Sea Pro Series, represents a robust and reliable option for marine propulsion. Designed for a variety of watercraft, this 2-cylinder, water-cooled engine delivers 30 horsepower and operates on gasoline. Its engineering focuses on dependable performance and efficient operation, making it a suitable choice for both recreational and professional marine applications. This Service Repair Manual provides comprehensive guidance for the maintenance and repair of the Mercury Mariner 30 HP Sea Pro outboard motor, specifically for serial numbers 09855139 and above. It covers essential areas including detailed maintenance schedules, lubrication requirements, troubleshooting common issues, and technical specifications. This manual is an indispensable resource for owners, technicians, and mechanics seeking to ensure the optimal performance, longevity, and safe operation of their Mercury Mariner outboard motor.