This manual covers the Mercury OptiMax 135 and 150 outboard engines, featuring Direct Fuel Injection technology. These engines are engineered for reliable performance in a variety of marine applications, offering efficient power and robust construction. Their design prioritizes durability and optimal fuel delivery, ensuring a superior boating experience for owners who demand quality and dependability from their marine propulsion systems.

The purpose of this manual is to provide comprehensive guidance for the maintenance, repair, and technical understanding of your Mercury OptiMax engines. It details essential procedures, troubleshooting steps, and technical specifications necessary for proper upkeep. By following the information presented, owners and technicians can effectively maintain the engine's performance, ensure its longevity, and address any potential issues with accuracy and confidence.