This workshop service repair manual covers Mercury Mariner Outboard engines, specifically models ranging from 6 HP to 15 HP. These 2-stroke engines, featuring water cooling and a through-propeller hub exhaust, are known for their robust construction and reliable performance across various applications. The manual encompasses engines with displacements of 123cc for the 6 HP models and 212cc for the 8, 9.9, 10, and 15 HP variants. These outboards are equipped with a standard right-hand propeller shaft rotation and utilize a Capacitor Discharge ignition system, offering either manual recoil or electric starting depending on the specific model. The purpose of this comprehensive English-language manual is to provide detailed guidance for the maintenance, repair, and troubleshooting of your Mercury Mariner Outboard. It includes essential information on engine specifications, recommended fluids such as Mercury Premium 2-Stroke Outboard Oil and unleaded gasoline with a 50:1 fuel mixture, and procedures for servicing critical components like spark plugs and anodes. Owners, technicians, and mechanics will find step-by-step instructions, technical data, and safety precautions necessary to ensure optimal performance and longevity of these dependable outboard engines.