This service manual covers the Mercury Mariner 135 HP and 150 HP outboard models. Designed for reliable performance and durability, these engines are engineered to meet the demands of various marine applications. Their robust construction and advanced technology ensure a superior boating experience for owners. This comprehensive manual provides detailed instructions and specifications for the maintenance, repair, and servicing of your Mercury Mariner outboard. It includes essential information on troubleshooting, technical data, and safety procedures, empowering owners and technicians to keep the engines in optimal condition and ensure long-term operational efficiency.