The 2020 Mercury Mariner 20 JET is an outboard jet drive engine designed for reliable performance. Featuring a 20 horsepower nominal output and a displacement of approximately 20 cubic inches, this engine is engineered for efficiency and durability. Its jet drive transmission provides a unique propulsion system, making it suitable for various watercraft applications where shallow draft operation is advantageous. The Mercury Mariner 20 JET represents a commitment to robust marine engineering. This Service Repair Manual provides comprehensive guidance for the 2020 Mercury Mariner 20 JET. It covers essential maintenance procedures, troubleshooting steps, and detailed technical specifications necessary for the upkeep and repair of your engine. This manual is an indispensable resource for owners, technicians, and mechanics, ensuring the longevity and optimal performance of the Mariner 20 JET through accurate information and clear instructions.