Breaking in a new outboard engine can be a daunting task. You want to be sure that the task is completed correctly in order to ensure optimal performance and longevity of the outboard. Before you begin breaking in a new outboard engine, particularly an OptiMax outboard, be sure to read through the Operation, Maintenance & Warranty manual.
Generally, keeping the throttle wide-open or idling for any length of time is to be avoided during the first two hours of use. In older two-stroke models, the process of breaking in required extra oil, but the OptiMax engines use specific computer programming to increase the oil mixture during the breaking-in process. In order for the computing to work, you first need to be sure that you have the appropriate amount of Mercury OptiMax oil in place.