This manual covers the Mercury Mariner Optimax DFI outboard engine, a V6, 200 horsepower model with a 3.4-liter displacement. Featuring Direct Fuel Injection (DFI) technology, this engine is engineered for improved fuel economy, reduced emissions, and enhanced performance. The DFI system, coupled with an electronic ignition and water-cooling system, represents advanced engineering for reliable operation. This outboard is designed for a wide range of marine applications, offering robust power and efficiency.

This Factory Service Repair Manual provides comprehensive guidance for the maintenance and repair of your Mercury Mariner Optimax DFI engine. It details installation, removal, disassembly, assembly, repair, and check procedures, along with technical specifications and safety guidelines. This manual is an essential resource for owners, mechanics, and technicians to ensure the continued optimal performance and longevity of the engine, covering models within the specified serial number range.